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12 Best Dive Knives Reviews in 2020 (Buyers Guide)

You might need a lot of gear to take with you on your scuba dive. This gear may include your dive computers, fins or masks. As the number of gear increases, so does the cost.

But when it comes to your safety underwater, then a diving knife is going to be a must-have for you. It will not only provide you with peace of mind but will also keep you away from danger if in case something goes wrong.

As you are exploring the underwater world, you will need a good quality cutting tool at your disposal. It should be a reliable one because you are going to take it to a place where there is no kitchen right next to you where you can shift between different cutting options.

We have done all the research for you and have developed a list of 12 best dive knives. Apart from that, we will also provide you with our buying guide and a list of frequently asked questions to further assist you in making the right decisions.

So without further ado, let’s unfold our findings with the comparison chart of the top 12 best knives for diving!

Comparison Chart of Top 12 Best Dive Knives

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Note: Please use these as a reference only. Features & specifications are subject to change without any notice. Thanks

12 Best Dive Knives Reviews

1. Cressi SkorpionDive Knife

12 Best Dive Knives Reviews in 2020 (Buyers Guide) 1

Quick Specs

› Weight: 8 ounces
› Knife length: 23.20 cm
› Blade length: 11 cm
› Material: Stainless steel
› Edges: Straight & serrated

Cressi is famous for manufacturing innovative products with stylish designs. They present a Cressi Skorpion dive knife in medium size. Cressi giant knife uses Japanese 420 corrosion-resistant stainless steel material with a combination of a tempered blade.

If you are looking a knife for spearfishing and scuba diving, then Cressi scuba knives giant should be your first priority. This modern knife comes with a tempered resistant blade of AISI 304 steel. Additionally, it has a smooth straight and serrated edge that incorporated with a wire cutter.

Furthermore, Cressi Skorpion dive knife is accessible in two blades, and you can opt according to your requirements. These two blades offer different tips like a blunt tip and pointed tip. The overall length of the knife is 23.20 cm, and the blade length is 11 cm. Overall the dimension of the product is 1-inch x 1-inch x 4-inch, and 8 ounces weighs.

According to length and tips, Cressi Skorpion dive knife blunt tip is perfect for scuba diving, free diving, and spearfishing. Moreover, both straight edge and serrated edge are nicely sharp and effectively useful for line cutting. The best thing is that it comes with safety features. A cover of the knife comes with a locking mechanism that permits one-hand release.


  • Sharp edges for extensive use.  
  • Carrion resistant stainless steel blade.
  • Comes with dive knife leg and arm straps.
  • Ideal for hammering due to the butt cap.
  • Non-slippery and anatomical handle. 
  • Available in seven colors.       
  • Medium size best for scuba diving.


  • Blade and handle get rusted after some use.
  • Improper locking mechanism.


Cressi predator knife is truly a great tool that comes with stainless steel and tempered blade. Both blade features are popular among freedivers and scuba divers. The non-slip and anatomical handle lets you kill the predator in the hour of need.  

2. Promate Sharp Knife

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Quick Specs

› Weight: 7.5 ounces
› Knife length: 24 cm
› Blade length: 11.3 cm
› Material: Titanium
› Edges: Straight & serrated

The main goal of Promate is to present high-quality products, and titanium dive knife is one of them. They use rust-free titanium material to construct it that enhances its reliability and durability.

The dual secure lock provides safety, and you can push double button for activating this feature. Hence, we can say that this lightweight diving tool is perfect for you.

Furthermore, spearfishing, snorkelers, and scuba divers are an interesting hobby but dangerous too.

However, you need protection while spearfishing and scuba diving. Therefore, Promate manufactured the full-sized dive knife titanium that comes with ergonomic rubber handle, plastic resistant ABS dive knife sheath, and rubber straps.

It is also accessible in both blunt and sharp tips. The sharp tip is best for fish stabbing while the blunt tip is ideal for spearfishing.

In addition to that, the 11.3 cm blade has two edges like the serrated and straight edge that can cut rope and fishing line. You can also use titanium End-Butt like Tank Banger for Hammering or Signaling Underwater.   

Moreover, if you are professional snorkelers and scuba divers, you can confidently use the Promate sharp dive knife. Because it comes with ergonomically designed rubber made a handle that enhancing grip and comfort level.


  • Titanium construction.
  • Lightweight & durable.
  • Rust-free 11.3 cm blade.
  • No maintenance required.
  • Ergonomically designed handle.
  • Double secure lock.
  • Available in ten colors.


  • Straps come with low quality.
  • Difficult to operate with one hand due to poor sheath.


As a beginner diver, you can use the hammer nub placed on the handle and the knife with the same tool. The best thing is that you can attach it with your leg and arm as well because it is equipped with a premium quality two straps. 

3. Cressi Borg Knife

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Quick Specs

› 12-inch x 2-inch x 6-inch
› Weighs about 1 pound
› 304 Japanese stainless steel
› Ergonomic design on the handle
› One-hand release on the sheath

The Borg is a large and powerful knife with a futuristic design. One side of the blade is smooth while the other is serrated to accommodate your different needs. Each side of the blade is equally sharp against the toughest obstacles.

This blade is crafted with Japanese (304) stainless steel, which is perfect for diving. Stainless steel is good for several reasons. This is the kind of metal that can be cleaned and maintained easily.

For this very reason, stainless steel on this knife is the best choice. Not only is this knife unlikely to rust easily, but it is also easy to clean and maintain after each use.

Now let’s talk about the handle on this knife that is undoubtedly one of the best dive knives available. This handle has an ergonomic design that assures a firm grip even if you’re wearing gloves.

There are times your hand might have slipped from the handle and across the blade to give you a cut. This is a safety hazard, but the handle of this knife is protected against it.

The handle of this knife is separate from its blade with a thumb tab of techno-polymer. This sheath features a locking mechanism that allows you to release the blade with one-hand. Additionally, this sheath comes with two, standard issue straps to secure it to your leg.


  • This knife comes in a protective sheath.
  • The sheath features a one-hand release. mechanism.
  • The knife is made from powerful stainless steel.


  • It can rust easily if not properly maintained.
  • The strap needs to more adjustable.


As we’ve mentioned, the design on this blade is good for cutting through the toughest material. You can use the straight-edged part to easily slide wires and ropes away when you need them. If you find something tougher, then you can use the serrated edge to cut through it as well.

4. Snake Eye Tactical Dive Knife

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Quick Specs

› 9 x 2 x 2 inches
› Weighs 7.2 ounces
› Stainless steel blade
› Stainless steel blade
› Features a protective sheath

The Snake Eye Tactical Dive Knife is arguably one of the best military dive knives. This knife has a simple design, but it performs well every time. With proper maintenance, this knife would last you a long time even after long use.

The blade on this dive knife is sturdy stainless steel that is tempered to perfection. This is the kind of metal that is easy to clean and maintain. All you have to do is wash it with fresh water and apply oil before you put it away. This blade has a sharp point that is good for cutting through lines easily.

This blade comes in a thick, protective sheath that keeps it safe underwater. This sheath is good to keep this blade safe when not in use as well. Additionally, this sheath comes with a full-proof locking mechanism.

The securing mechanism on this sheath means that this knife will remain safe. This locking mechanism is designed to allow you easy access. You can release this knife with one-hand and secure it just as easily.


  • Simple design that features a razor-sharp edge.
  • Stainless steel blade that is easy to maintain.
  • This blade comes with a strong protective. sheath.
  • It also features straps to help you secure it.


  • The handle on the knife is uncomfortable to grip.
  • The strap needs to be a little more flexible to allow more room.


This dive knife comes with convenient leg straps that help you secure it on your person. You will find that with certain knives you will have to buy the accessories separately. This dive knife, on the other hand, comes complete with all you need.

5. Cressi Dive Knife

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Quick Specs

› 304 Japanese stainless steel
› The knife is 160 mm in length
› One-hand release sheath
› Comes a lanyard that secures the sheath to the leg strap
› Features a belt clip

This short blade comes with the quality assurance of Cressi except in a compact size. You can expect the same strength and quality on this blade as the previous models.

This blade is forged from powerful 304-stainless steel in a shape that is suitable for cutting through lines. The blade comes in a protective sheath and a lanyard to secure it.

The blade is constructed from Japanese (304) stainless steel that is tempered into a solid blade. This blade is resistant to the saltwater and protected against rust as well as physical damage.

The shape of this Dive knife is pretty impressive. It’s a small knife that will fit within your hand, making it easy to use. The knife is about 160 mm in length while the blade is 62 mm. The bottom side is straight-edged, and the top is serrated. This blade is razor-sharp on each side and is great in an emergency.

This Cressi Lima dive knife can be secured on your person for quick access. You also receive a back clip that you can use to attach the knife sheath to your BCD strap. The sheath itself can be secured using a lanyard, keeping it within your immediate reach.

If you need to cut your friend loose in a hurry, you can quickly pull up the knife and release it. The grip allows you to cut through it quickly without causing any trouble.


  • It comes with a sheath and a lanyard.
  • The knife is made from Japanese stainless steel.
  • The sheath has a one-hand release system.
  • The compact size makes it easy to use.


  • The locking mechanism is a little tricky.
  • The sheath is a little loose for the knife.


Although the sheath is completely secured within layers of protection, it can be easily released. The sheath had a built-in release system that lets you access the knife in a hurry.

6. Audeamus Dive Knife

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Quick Specs

› Titanium alloy blade
› Secure sheath lock
› Features standard leg straps
› Rustproof

The Audeamus is the perfect dive knife for swimming. This knife is easy to retract in a hurry, and the lock is reliable. The design on the blade is good for cutting through nets quickly and effortlessly. The handle, on the other hand, has a very comfortable grip.

This dive knife has a powerful blade that is extremely sharp. It sports the standard scuba knife design that is good to use on either side. The metal is tough titanium that is treated several times before being cast into the blade.

This Titanium alloy is not only sharp and durable but is also rust-resistant. The Titanium blade does not collect rust easily even after a long time of use.

The handle on this dive knife might feel a little bulky, but it provides a secure grip. If you’re underwater, then you don’t need a knife that is ready to slip right through. This handle allows you a secure grip to use it with confidence.

One of the reasons people need to keep coming back for dive knives is because of how often they lose them! You could lose your dive knife while trying to remove it from the sheath or when you’re securing it.

Unfortunately, you could always lose it while you’re swimming around if it’s not tied firmly. The very reason this dive knife is good for swimming is the secure sheath that is easy to use.


  • Rustproof Titanium alloy.
  • Protective sheath to secure the dive knife.


  • The lock is difficult to maneuver if you are left-handed.     
  • The strap is not adjustable.


You can keep your dive knife protected in your sheath without worrying about losing it. This sheath is also convenient to lock and release. You can hear the catch make an audible click that signals the knife is secured.

7. Promate Barracuda Diving Knife

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Quick Specs

› Blade length 5”
› Sharp Tip
› Blade edge: serrated/straight/notched
› Titanium blade

The Promate Barracuda diving knife is developed for professional swimmers and athletes. The blade strength, the handle design, and the grip are all designed to give you a worry-free experience. These knives are good for several emergencies.

The blade on this dive knife is about 5” in length and made from Titanium. The titanium is tempered to withstand damage against the water. This blade is tough and sharp, as well as easy to maintain. As long as you keep this blade dry and clean, you can manage to keep this blade for a long time.

This blade comes with a sturdy handle that is good for multiple uses. You can turn the blade around and use the titanium hammer on the handle bottom. The handle itself allows you a secure grip while you use it. Admittedly, it can feel a little bulky within your grip if you’re not used to it.

The design on this blade is serrated on one edge and straight on the other with a notch. The tip of this dive knife is very sharp, and the shape allows you to cut through anything.

Along with the blade, you get a protective sheath that has a quick release. This sheath is easy to use and keeps your blade safe from harm. One of the best features of this dive knife is that it is easily disassembled. This makes the knife is easy to clean and maintain.


  • Titanium blade that is resistant against rust.
  • Adjustable leg straps that are comfortable to wear.
  • Quick-release on the sheath.
  • Easy to clean and requires little maintenance


  • The handle design needs to be revised.
  • The plastic sheath is a little tricky to secure.


Thankfully the straps are adjustable and comfortable to wear on your person. The dive knife leg strap on these durable as well.

8. Atomic Aquatics Diving Knife

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Quick Specs

› Length of blade: 4”
› Blade design: serrated/notched
› Secure lock on the sheath
› Lightweight sheath with straps
› Titanium blade

The Atomic Aquatics diving knife comes in a compact size to make it easy to remove and replace. The titanium blade on this knife is sharp and can cut right through lines. The sheath is lightweight and secured by straps.

The blade on this knife is tough titanium and is made to last with a reliable design. This blade is serrated on one edge and has a notch on the other. You can use this notch to untangle or cut through any lines.

The blade on this diving knife is about 4 inches in length but sharp enough to get the job done every time.

Sometimes sheaths on dive knives are difficult to maneuver because of their design. The sheath on this dive knife is easy to use and lets you release the blade quickly. This is a good and reliable case for your knife as it keeps your knife safe for quick access. On top of which this sheath is also lightweight but easy to wear.

There might have been a time when you lost your knife just as you were about to put it away.  This is because the lock is not secured and the knife, unfortunately, slips out. The sheath on this knife effectively solves the problem as it is very secure. This lock keeps your knife safe but also allows a quick release.


  • A sharp and serrated edge.
  • Titanium blade.
  • Secure lock and sheath.
  • Lightweight sheath.


  • The handle is a little small.
  • It can rust over long use.


The straps on this sheath help you secure the knife. The straps are easy to adjust and fit well around you, so you don’t have to worry about feeling restrained.

9. Underwater Kinetics Dive Knife

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Quick Specs

› Titanium blade and pommel
› Resistant against corrosion
› Blade design: serrated/notched
› Large coil contoured handle
› Blade length: 5”

The blade on this diving knife is perfect for anyone looking for military-grade equipment. This blade is about 5 inches and made from powerful titanium. You can use this knife without worrying about any longtime damage.

Usually, dive knives are difficult to maintain and only meant for limited use. This dive knife is, however, 100% resistant to corrosion.

This knife is safe to use and can last you a long time if you remember to keep it clean. The handle provides a firm grip thanks to the contoured design. It can be difficult to keep a grip on knives underwater.

But these knives provide a secure grip with the titanium pommel. This handle is also good to be used as a hammer if you need it. The pommel is also protected against corrosion.

The blade on this knife is serrated on one side with a large notch. This notch is good to cut through the thickest rope or line. This knife can be quickly disassembled for maintenance. You can take it apart and put it back together in minutes. This feature does cleaning and maintaining the knife hassle-free.

Lastly, this knife is all black, but it features bright yellow detailing. This design not only makes the knife attractive, but it also makes it easy to spot. If you drop the knife accidentally, his feature will make it easier to find.


  • Titanium blade that is resistant to corrosion.
  • Contoured handle for a secure grip.
  • Serrated edge can cut through rope or line


  • The titanium blade is a light to use as a hammer.
  • The sheath is a little difficult to maneuver


This diving knife from Underwater Kinetics is powerful from the tip to the handle. The blade is sharp enough to cut through lines without effort. The handle provides a good grip, and the overall design makes it easy to spot.

10. XS Scuba Knife

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Quick Specs

› 12 x 4 x 2 inches in length
› 6.4 ounces in weight
› Features patented shears
› 420 Stainless steel
› Corrosion-free and easy release

You get a sturdy knife and powerful pair shears all in one piece of equipment. These shears are patented and work well underwater.

It’s quite possible that you don’t want to spend a lot of money just on a dive knife. If you’re the kind of person that appreciates tools that can perform more than one function you will appreciate this.

This dive knife features an impressive pair of shears. And for people that aren’t comfortable using a knife underwater can rest assured. These shears can cut through anything you need.

The blade is about 3/8″ long, and it’s constructed from tough 420-stainless steel. This is a good metal for equipment that is used around or underwater. Stainless steel is strong and lasts a long time without incurring too much damage.

On top of which stainless steel is easier to clean and maintain. This feature also makes this scuba knife corrosion free and resistant to wear. This blade has a serrated edge that cuts through lines.

Now let’s discuss some of the safety features on this knife. The whole point of dive knives is that you can access them in an emergency. You should be able to depend on your equipment to perform when you need it.

This scuba knife from XS Scuba also features a patented easy-release and positive-locking sheath. You can not only easily access this blade, but you can secure it just as quickly. You don’t have to worry about losing it as you put it away.

Additionally, you also receive high-quality rubber straps to secure the sheath. These sheaths are strong and also resistant to damage.


  • This knife also features a pair of shears.
  • Patented easy-release system.
  • Strong rubber straps to secure the sheath.
  • Patented positive-locking sheath.


  • The knife is not as sharp as the shears.
  • The holder feels a little loose.


This dive knife combines the latest innovations in technology and brings you one of the best scuba knives. The shears of this knife can cut through anything you need.

11. Cressi Alligator Dive Knife

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Quick Specs

› 420 Japanese stainless steel
› Treated against rust prevention
› Ergonomic design
› 10 x 2 x 1 inches in length
› 12.8 ounces in weight
› Features a pair of scissors

These knives are practical are good in all kinds of emergencies. One piece of equipment features a knife and a pair of scissors. Each of these tools is military-grade and made from strong stainless steel. This knife is ideal for anything from scuba diving to spearfishing.

This knife is designed to cut through lines and ropes within seconds. The built-in scissors can cut through it all. These scissors are also stainless steel and good for use underwater. The 420-Japanese stainless steel is powerful all by itself. But for this particular knife, the stainless steel is treated against rust.

One of the biggest advantages that you would have with this knife is the size. This knife perfectly combines a knife and a scissor.

This knife does this while keeping its compact shape that is easy for you to use and store. You don’t have to open this knife, in case you want to cut something quickly. The blade works as well as the scissors to cut through whatever you want.


  • The blade is 420 Japanese stainless steel.
  • It features a strong pair of scissors.
  • The handle allows a firm grip.


  • The scissors can rust shut if not maintained.
  • The handle is a little stiff in your grip.


Cressi is the brand that had long developed the best scuba and fishing equipment out there. This knife combines their expertise with the latest innovations to bring you what you need.

12. U.S Divers Diver’s Knife

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Quick Specs

› Length of blade: 5”
› Design of blade: serrated/straight/notched
› Quick-release sheath
› The handle comes with a lanyard hole

The diving knife features a 5” blade that can cut through rope seamlessly. The construction on this blade is impeccable, and it supports professionals in their trade.

This knife comes with a 5″ blade that is serrated on one-side to cut through lines. On the other side of this knife, there is a notch that you can use to untangle wires. The entire knife is a one-piece that works together perfectly. The serrated edge is meant to cut through the toughest materials with ease.

This knife can be disassembled for cleaning and maintenance. You can put the knife back together just as easily. If you keep up the cleaning consistently, then this knife will last you a long time of use.

You will also receive a quick-release sheath and rubber leg straps. In an emergency, it can be difficult to unlock the sheath of knives underwater.

However, the quick-release sheath on this knife takes care of that problem. The rubber leg straps secure the sheath to you firmly for immediate access. On top of which the sheath and the straps are both resistant to wear.

This diving knife has a sturdy handle that is all in gray but provides a secure grip. The handle on this knife comes with a lanyard making it easier to secure. Additionally, this knife comes with a 2-year warranty (can be changed as company policy) that assures long-lasting quality.


  • A powerful 5” blade.
  • Patented quick-release sheath.
  • A thick gray handle that provides a secure grip.
  • Comes with warranty.


  • The straps on the sheath are difficult to adjust.
  • The holster could be sturdier.


You can use this knife for scuba diving or spearfishing. The quick-release sheath on this knife takes care of an emergency situation.

How Have We Picked?

We have picked each of these knives after conducting thorough research over the internet. Apart from that, these reviews come from a team that has been involved in scuba diving for a very long time.

So we have not only tried and tested most of these products but have also asked around from our peers who are experts in this field. In addition to that, we have also interviewed some of the customers to gather more insights.

Furthermore, we have gone through a number of reviews from various leading online sites, including Amazon and others, and then compiled all the information. This allows us to paint a complete picture with accuracy and authenticity.

Important Considerations Before Buying The Best Diving Knives

In this buying guide, we will put forward some of the key factors that you need to consider before buying a good quality dive knife. We have listed these factors as follows:        


Oceans have a harsh environment, and a regular knife won’t be able to survive it for long. The reason behind that is Manufacturers use different materials to create their knives, and they tend to react differently with salt in the ocean water.

This can result in rusting and corrosion. For this reason, we will strongly suggest that you go for a titanium or stainless steel materials. Stainless steel knives require frequent maintenance.

Steel with a low number such as 300 will indicate that the carbon content is high and so is the quality but you will have to make a considerable amount of effort to keep it sharp for long. You will have to take care of these knives and rinse oil or wax on them after every dive. It will keep them from rusting or corroding.

On the other hand, titanium has a finer quality, and it doesn’t need much maintenance as well. But these knives are very expensive. These knives are very difficult to sharpen, but they also don’t need much sharpening either. Titanium knives don’t rust or corrode and will last for a long time.      


When we talk about the best dive knives bigger is not always the better. These knives tend to rage in size from three to six inches. But we would suggest that 3.5-inch to 5-inch knives are suitable for underwater endeavors. It will be enough to cut any ropes or any other materials. Plus, this size will be compact enough for carrying around without much weight.    


You can either choose for a dull tip or a pointed one. Some people will prefer a pointed knife, so they are not able to puncture anything. If you are a newbie at diving, then it is better for you to choose a blunt knife.


Primarily, there are two different kinds of blade edges. Both these blade types must feature in a dive knife. One side of the blade should be serrated while the other one needs to be straight. If you must decide between these two features, then you must first consider the serrated blade. This blade stays sharper for longer and can cut through tougher materials easily.


Manufacturers design these knives in such a manner that you are able to grip it effectively underwater. The upholstery for these knives also come with some loop or belt that you can attach with yourself. Some might also feature a strap that you can attach to your thigh. This way, the knife will be out of the way, and you can quickly access it as well.

The only disadvantage here is that it can get caught on different things. The upholstery itself needs to keep the knife well in place and allow you to access it quickly in time of need. It needs to be user-friendly in all aspects, and even the people who are new to diving can use them with full authority.

Frequently Asked Questions

What are dive knives made of?

Typically, the blades of the dive knives are made of titanium or stainless steel. In recent times, titanium allows also gaining a lot of popularity. Allows usually add a lot of strength to the blade and it keeps in shape for a long time to come.

What makes a good dive knife?

A good quality dive knife should be able to cut through even the toughest of materials. This knife doesn’t need to be very long, and a length between 3.5-inch to 5-inch is very suitable. It must also come with an excellent grip so that you are able to keep it in your hand even underwater.

Do you need a dive knife?

A diving knife is a tool that you can use in emergency cases. You can use it to cut different materials underwater and can also use it for safety. You can cut your way out of any entanglement with these knives. Why not use it as a simple tank-knocker to get the attention of your friends underwater.

Do I need a dive knife for snorkeling?

These knives are specifically made for diving where there is a significant amount of risk of entanglement. Snorkeling doesn’t involve such type of risk, and for this reason, you don’t need a dive knife in such a scenario.

What are the advantages of a good diving knife?

One of the major advantages of having a dive knife at your disposal underwater is that you will be able to manage any entanglement effectively. You can also keep yourself safe from any underwater animal attacks. Apart from that, you can use it as a simple tank-knocker too.

How often must I clean my knife?

If you are using stainless steel, then you will have to clean and oil your knife after every dive. This is a must, or your knife will corrode. On the other hand, if you own a titanium knife, then this doesn’t require much cleaning or maintenance.

Which one is better, titanium or stainless steel dive knife?

If budget is not your concern, then you definitely need to go for titanium dive knives. They will be expensive but they will also last for a long time and won’t need much maintenance. They are very hard to sharp, but you don’t need to sharpen them that often either. Stainless steel requires frequent maintenance but is cheaper than titanium. It will corrode very quickly, and you will have to oil or wax your knife after every dive.


Diving knives are essential tools for safety purposes underwater. With these alongside, you can literary cut out of any issue. If you are looking for a good quality product that lasts for a long time, and then consider a titanium model otherwise, a stainless steel model will suffice if you don’t do much scuba diving.

All in all, Cressi Skorpion is the best dive knife that you can find on the market. Made of tempered (304 AISI) stainless steel, this knife is best for spearfishing as well as diving. It features both smooth and serrated edges along with an incorporated wire cutter. You can either buy this knife with a blunt or pointed tip.

So, which one of these have you used before? Do you think we have missed something or have a recommendation for us? Leave a comment below and tell us your story.

Enjoy the dive!

See also: How to choose the best snorkel gear set and top 10 prescription snorkel mask for excellent visibility in underwater.

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