11 Best Dive Knife

A dive knife is very essential when scuba diving or snorkeling because it can be a lifesaver during emergencies.

With the help of a diving knife, you can easily free yourself in case you get caught in an abandoned fishing net or get tangled in a line.

Diving knives have specially designed cutting edges that will make your work easier even when cutting tough fibrous materials.

Besides, they are forged from materials that are virtually immune to corrosion, meaning saltwater conditions can cause minimal damage to the blades.

Additionally, diving knives come in two different designs, so you can choose the option that best suits you. As such, you can go for the pointed or blunt tip models.

The detailed review list below has covered both options extensively, so the only thing that is remaining is for you to go through the products, and pick the option that you find most appropriate.

11 Best Dive Knives

Our Top Pick: Atomic Aquatics Titanium Ti6 Scuba Diving Knife

Atomic Aquatics Titanium Ti6 Scuba Diving Knife Blunt and Pointed...
  • Corrosion-resistant full-tang Titanium blade
  • Elegantly curved 4-inch cutting edge

The diving knife from Atomic Aquatics comes with a reliable 4″ titanium blade that offers excellent corrosion resistance in salt water conditions.

Besides, it is designed with every diver’s needs in mind, so you can fully rely on it when you are underwater.

Furthermore, one edge of the blade is serrated while the other is straight, so you can use either side depending on the task requirements. It also has a line-cutting notch that can assist you in different situations.

The other feature that we liked about the Ti6 is that it has a full tang blade design, thus making it even more efficient.

Also, the blade is securely mated with the handle to ensure that users get a dependable cutting tool that won’t fail them in their time of need.

The grip area is ergonomically contoured to give you a firm grip in wet conditions, so the handle won’t slip during usage.

More on the handle, it feels good in the hands and will allow you to hold the knife for an extended duration without experiencing fatigue.

Plus, the straight edge is elegantly curved to increase the knife’s overall cutting performance. To add to this, it is highly resistant to wear, meaning it will retain its edge for a long time.

The Ti6 features a one-hand release sheath mechanism that will enable you to deploy the blade with ease.

What’s more, the quick-adjust sheath straps allow for easy customization. To top it all up, the Ti6 is available in two different models that you can choose from.

This particular model has a pointed tip, while the other is designed with a blunt tip, so it is up to you to pick the knife that matches your needs.

Pros

  • Made of premium quality
  • Extremely durable 
  • Excellent craftsmanship

Cons

  • Not easy to hone since it is titanium-built

Most Compact: Scuba Choice Scuba SCKN-168P Diving Knife

If you’re looking for a diving knife with a minimalistic design, this may just be the right product for you.

It comes with a 420 stainless steel blade that is uniquely designed to give you exceptional performance.

Like the Ti6, this knife is partially serrated and also has a plain cutting edge, so you will get the best of both worlds.

To add to its list of features, it has a hook-like notch that can come in handy when cutting ropes and fishing nets.

Thanks to its compact design, you can easily mount this knife to your BCD (buoyancy control device).

Additionally, it has a blunt tip, so the chances of it puncturing your gear are very low. This makes it a suitable option for deep-sea diving or any other task that may require you to use a blade of this type.

The knife has an overall length of 7″ while the blade is 2.3″ long. Moreover, the dull tip can prove helpful when prying objects from the ocean floor and can as well be used for digging applications.

To prolong its durability, ensure that you rinse the blade with fresh water after each diving session.

The included plastic sheath holds the blade firmly, so you won’t lose the knife when you are diving.

When it comes to the handle, it is made of high-quality nylon that is molded to maximize grip.

Pros

  • Ideal for beginners and professional divers
  • Reliable
  • Easy to use

Cons

  • The sheath straps are not included

Best Full Tang: Promate Barracuda Dive Knife

Promate Sharp Tip Titanium Diving Knife (5 Blade), Black
  • Titanium blade and hammer on handle bottom
  • Quick release and adjustable straps

The KF519BK-C from Promate is equipped with a 5-inch titanium blade that is virtually immune to corrosion.

With proper care, it will stay in good condition for an extended period, and the best part is that it requires minimal maintenance.

Like most diving knives on the list, the blade features a plain edge and a serrated edge for user convenience. Both edges are hardened to increase the cutting power.

There is also a notch on the blade that will allow you to cut fishing lines with ease. This knife has a pointed tip that you can use for piercing applications.

The handle is expertly designed and is also contoured to give users optimum comfort.

Aside from that, it increases traction, thus preventing unnecessary slippage when using the knife.

The KF519BK-C comes with a durably built plastic sheath that will help you keep the blade safe during storage.

In addition to this, you will get quick-release straps that you can use when attaching the sheath to your leg.

On the downside, the cutting edge is not easy to sharpen because it is made of titanium.

Pros

  • The rear end of the handle is fitted with a tough pommel
  • Adjustable straps
  • The handle has a lanyard hole

Cons

  • The pointed tip can easily puncture your gear if care is not taken

Best for BCD Diving: Cressi Short Blade Knife

Cressi Lima, Lime
  • The Lima is a great emergency knife for scuba diving and a very desirable knife for the spear fisherman. It is very small and compact. This allows it to be conveniently attached to the diver's gear.
  • The blade is made of Japanese stainless steel 304, very resistant to the salt Sea water. The knife is long 6. 3 in (160 mm) and the blade 2. 44 in (62 mm).

This knife is almost in the same size range as the SCKN-168P, and that is exactly why we recommend it for BCD diving. It is compact and equally lightweight, so you can easily attach it to your diving equipment.

Besides, the included hose holder allows for quick and easy attachment to buoyancy compensators.

Nevertheless, you have to keep in mind that the blade has a sharp pointed tip that can puncture your gear, so you should exercise caution when pulling the knife from the sheath.

The blade is forged from Japanese 304 stainless steel to increase durability. As such, it won’t corrode when exposed to salt water conditions.

Still, you should clean the knife with fresh water to neutralize the effects of salt water after you are done using the knife.

And since the spine is serrated, you can use the blade for sawing applications, especially when cutting materials that are likely to damage the plain edge.

This knife can particularly come in handy during emergencies because it is super-efficient and will help you get the job done in no time. It can effortlessly cut through fishing net, rope, and other types of fabric.

The click-in sheath has a reliable locking mechanism that you can engage or disengage using one hand. To achieve the former, simply press the side tabs and the knife will come loose from the sheath.

That is not all; attached to the sheath is an easy-to-use belt clip that is both strong and reliable. The curved handle offers a solid grip, thus providing you with a non-slip cutting experience.

Pros

  • Interchangeable holder
  • Durable blade design
  • Suitable for spearfishing

Cons

  • The sheath needs improvement

Most Ergonomic: Thresher Dive Supply 5” Titanium Dive Knife

5” Titanium Dive Knife with Leg Strap and Sheath - Premium...
  • GET A GRIP: This sharp scuba knife has a fatter, rubberized grip than most other knives, making it feel like it was made for you. Ergonomic to say the least. Whether you’re fishing, snorkeling, or scuba diving, it will feel just as comfortable in your hand at the end of the day as it did the first time you took it out of the sheath.
  • ALLOY MATEY! Well you may have never used the phrase, “Ahoy Mate”, but we’re referring to something else here. The blade on this diving knife is manufactured from titanium alloy, known for its’ strength, light-weight feel, and corrosion-resistant properties. Truly an excellent accessory to have on any underwater excursion.

This knife has one of the best handles on the list, making it one of the reliable options that can help you tackle a wide range of operations under water.

The grip area is contoured on the lower side, while the upper part has multiple notches that prevent slippage. And because it is rubberized, it will provide you with a grip that is not comfortable firm but also firm.

Despite having a heavy-duty design, this knife is exceptionally lightweight, so it won’t weigh you down when diving.

When it comes to the blade, the manufacturer has used tough titanium alloy that will provide you with long-lasting service.

More to this, it is corrosion-resistant and can withstand just about anything that the underwater world may throw at it. It can help you free yourself from fishing nets that may be lying around on the reefs or ocean floor.

The titanium pommel is also another amazing feature that is worth mentioning because it can help you draw the attention of your dive buddies by simply tapping on your oxygen tank.

With that said, you can fully count on this knife in case you find yourself in a tough situation down below.

The package is inclusive of well-made straps that you can wrap around your thigh without constricting blood flow.

Pros

  • The sheath has a dependable locking mechanism
  • Efficient striker notch
  • Built to last

Cons

  • The sheath is made of plastic

Best Multifunctional: Scubapro Mako Dive Knife

Scubapro Mako Titanium Diving Knife with 3.5-Inch Blade for Scuba...
  • Scuba rust-resistant titanium blade is incredibly strong and has the hardness to take and hold a sharp edge.
  • The multi-function 3. 5-Inch blade Includes a serrated edge for sawing through rope, a conventional edge for making clean slicing cuts, a line-cutting notch, and a bottle opener.

This diving knife has a practical design, so its use can apply in different scenarios. For starters, it features a 3.5-inch blade that is forged from high-quality titanium to minimize wear.

To add to this, it offers great corrosion resistance and excellent edge retention. This knife has a serrated cutting edge and plain edge that you can use when dealing with different materials. The former is ideal for sawing while the latter is perfectly suited for slicing.

And because both edges are hardened, they won’t chip during usage. The handle is somewhat unique in that it has an integrated bottle opener.

To make it even more convenient, it has a large grip area, thus providing you with a comfortable grip.

The thumb guard not only prevents slippage but also safeguards your fingers against cuts. Plus, the sheath has a strong locking system that prevents the knife from coming loose.

More on the sheath, it has a strategically placed drainage hole that prevents pooling. As such, all the water will flow out when you are done diving.

The materials used in the construction are of superior quality, so you won’t have to worry about durability.

Pros

  • Conveniently designed
  • High performance
  • Sturdy construction

Cons

  • The straps may be too short for some users

Best Entry Level: Underwater Kinetics UK30071 Blue Tang Titanium Diving Knife

Underwater Kinetics Blue Tang Titanium Dive Knife, Blunt Tip,...
  • Solid titanium blade and pommel are 100% corrosion resistant and non-magnetic
  • Hollow ground straight and serrated knife edges for all types of cutting

As the name suggests, this knife features a tough titanium blade that will provide you with long-lasting service.

The serrated blade is very efficient when it comes to cutting fibrous materials. As such, you can use it to cut kelp, fishing lines, and nets.

On the other hand, the plain edge can assist you in multiple ways, thanks to its versatile design.

Depending on your needs, you can go for the knife with the drop point piercing edge or the one with a dull tip.

The UK30071 comes with a blunt tip that is specially designed for chiseling, prying, and digging. Also, it can help you pull out objects from the ocean floor without defacing the reefs.

Its unique blade design makes it even more efficient since you will be able to do multiple things with the same knife.

The titanium cap at the end of the handle can be used as a hammer when breaking through hard surfaces. You can easily attach the sheath to your arm or thigh using the included straps.

Pros

  • Excellent ergonomics
  • Easy to clean
  • Delivers maximum cutting power

Cons

  • Too big for BCD

Most Versatile: Cressi Diving Knife

Cressi Grip, Titanium, Black, 6.8 Inch
  • The Grip Titanium is a small-sized knife with a titanium blade that last longer and is easy to use; perfect for spearfishing and scuba diving.
  • Titanium Blade is rust resistant and features high precision sharpened tip.

Cressi presents you with yet another high-quality diving knife that you can consider adding to your kit.

We included this piece in our review list due to its high level of efficiency and versatility. It has amazing features that can prove helpful when scuba diving, spearfishing, snorkeling, or when taking part in other water sports that may require the use of a knife.

Like most knives in its class, the blade is made of titanium, so you can buy this product knowing that its quality won’t degrade over time.

Nonetheless, this will only apply if the knife is given proper care during and after usage. Ensure that you rinse the blade with fresh water to lower the risk of corrosion.

Since it is compact and lightweight, you can easily attach it to your diving gear and can also work with BCD equipment.

Moreover, it comes with two BCD-mount straps that allow for quick attachment. This knife has a reliable straight blade that can assist you when cutting different types of materials.

The opposite edge has serrations and a cutting notch that will allow you to cut thin ropes and fishing lines without straining yourself. Lastly, the sheath allows for easy blade locking and deployment.

Pros

  • Well designed
  • The knife easily locks into sheath
  • Requires minimal maintenance

Cons

  • The lanyard is not included

Best Double Edge: Aqua Lung Argonaut Titanium Diving Knife

Aqua Lung Argonaut Knife - Spartan Tip
  • Blade and Handle are made of 4mm thick Titanium with an EDP coating. The handle is double wrapped in 5mm paracord
  • The blade comes in 2 styles, Spartan and Blunt

Featuring a dual-edge blade design, the diving knife by Aqua Lung is also another excellent option that you can go for.

The knife has a dagger-like design and comes with a 4.88″ titanium blade that is finely ground to a sharp cutting edge.

Plus, the handle is the same length as the blade, thus providing you with a balanced grip that will allow you to cut with precision.

The blade is available in different styles, so ensure that you go for the option that best suits the task at hand.

This model features a Spartan piercing tip, but you can as well go for the blunt tip dive knife. The protective EDP coating keeps rust and other corrosive elements at bay, so the blade won’t lose its integrity even when used in harsh conditions.

Additionally, the handle is conveniently wrapped in a paracord to limit slippage. The paracord is slightly extended, so you can use it as a wrist lanyard for added security.

There is also a guard that will ensure your fingers stay in place at all times. The sheath is made of premium grade Kydex, a tough thermoplastic material that is virtually breakproof. It has slots through which you can attach the straps.

However, you may have to fasten the paracord from time to time since it is likely to loosen.

Pros

  • Factory sharpened
  • Non-slip
  • Reliable squeeze locking system

Cons

  • Honing the blade can a bit difficult

Best High-End: Scubapro K-6 Knife

Scubapro K-6 Knife
  • Quality stainless steel blade with a fine hollow-ground cutting edge on one side, a serrated edge on the other
  • 6.1in/15.5cm stainless steel blade

Unlike most knives on the list that are made of titanium, the Scubapro K-6 features a 304 stainless steel blade that will provide you with superior cutting power.

One of the things that we liked about this knife is its ergonomic handle. It is conveniently contoured and is also textured to ensure that you get a solid grip when under water.

In addition to this, it has a double blade design, so you can use the edge with serrations or the opposite side.

Each cutting edge is specialized for different applications and will enable you to slice through tough fabrics and other materials while applying minimal effort. This means you can easily cut fishing nets that may get caught up on your tank when diving.

Furthermore, the choil is sturdily built to maximize strength, so it won’t break, provided that the knife is given the right care. Aside from the cutting edges, it also has a sharp notch that can grip and cut simultaneously.

Then hollow-ground edge will allow you to make clean cuts when dealing with fibrous fabrics, plastics, and other materials.

To reduce the level of corrosion, you should rinse the knife with fresh water and ensure that it stays dry after each use.

Pros

  • Hammering end
  • Flat and serrated blade design
  • Easy-grip handle

Cons

  • Not suitable for BCD due to its size

Best All-purpose: U.S. Divers Titanium Diving Knife

U.S. Divers Titanium 5-Inch Diving Knife
  • 5-inch diving knife with 1-piece blade and tang assembly
  • Serrated top edge for cutting through tough materials

The titanium diving knife by U.S Divers may be last on the list, but that does not mean that it is less efficient.

In fact, it can be an excellent addition to your diving kit since it has all the features that you may look for in a dive knife. And the fact that it is made of titanium makes it even more efficient and durable.

This knife can be a lifesaver during emergencies, making it one of the go-to cutting tools that you can use when snorkeling or scuba diving.

And like the blade, the butt cap is made of tough steel and can help you break tough materials. The sheath is designed with a strong locking mechanism that will hold the blade securely as you move.

For your convenience, it features a quick-release system that allows users to draw the knife in a matter of seconds using just one hand.

The straps included in the package are elastic, so you can even wrap them around your legs. This will greatly lower the chances of the blade puncturing your diving gear.

To top it all up, the handle is contoured both on the upper and lower sides to increase grip.

Pros

  • Easy to disassemble
  • Comfortable grip
  • Corrosion-resistant

Cons

  • The plastic sheath is not as durable

Frequently Asked Questions

Do I need a diving knife?

If you are a regular diver who spends most of his/her time on the ocean floor, it would be wise to carry a diving knife because it can be a lifesaver.

A diving knife can help you cut fishing nets, lines, etc. Plus, most knives have pommels that you can use to get the attention of your diving buddy in case you find yourself in a sticky situation.

Why do some diving knives have blunt tips?

Knives with blunt tips are safer since they are less likely to puncture your diving gear. To add to this, they can come in handy when prying, chiseling, or digging.

What is the best diving knife?

When choosing a diving knife, ensure that you pick one that offers good corrosion resistance. Our review list can help you find the right knife.

How long should a diving knife be?

Most divers use a 3-5 inch blade size since the knife are compact and can easily be attached to most diving gear.

What are diving knives made of?

A good number of diving knives are forged from marine-grade 304 or 316 stainless steel, while others are titanium built. Also, most high-end options are made of titanium. You can also use a diving knife with a ceramic blade.

Final Verdict

Now that you have gone through our review list, we hope that you’ve found a suitable diving knife that you can rely on.

Since we care about your needs and safety, we have only gone for high-quality diving knives, so you can make your purchase without worrying about anything.

Besides, our selection is based on long hours of research to ensure that you only get products that are quality tested. All the knives have flat blades, thereby allowing for easy deployment during emergencies.

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