How to find the Best Dive Knives

Many divers carry a knife for different purposes, the most important of which is simply the peace of mind it offers. Knives can come in handy in case the diver find themselves tangled in seaweed, a fishing line, or kelp. They can also be used to pry or dig during a dive.

How to find the Best Dive Knife

In very rare instances, dive knives may be used for self-defense against the many predators in the sea. However, it’s an extremely unlikely occurrence, where a knife might not necessarily be the best tool to use.

Fascinatingly, dive knives are more often used on land rather than underwater. Some of the common uses of scuba knives include tightening or loosening screws, hammering or pounding items, and opening oyster shells. Furthermore, people who Spearfish frequently use their knives to prep and cut their prey for the ride back home.

What to consider when choosing a Dive Knife

Dive knives come in a wide variety of styles features. But it’s very important not to choose a knife randomly, since this is something your life may depend on. Here are some of the things you should consider when choosing the right dive knife for you.

Plain or Serrated Edge

One of the main purpose of a dive knife is cutting through ropes or other strong materials. If you would only consider this option, then a serrated blade will be the way to go. Straight edges are mostly used for cutting lines especially on finer things.

Most diving knives have both a plain and a serrated edge on each side of the blade. Ordinarily, you wouldn’t want to pick this knife, but keep in mind that dive knives aren’t used to puncture things, so it can be a handy advantage to have an edge for slicing things and another for cutting rope.


The handle of the knife is another very important aspect to consider. Since you’ll be in or around water most of the time, things are bound to get a bit slippery. The shape, texture, and build material of the handle are some of the things you want to check when choosing a dive knife. A nicely textured handle can firmly keep the knife in your hand, while a proper shape will make it easier to hold.

Using a scuba dive knife


The sheath is also very important, since it’s the only thing preventing your knife from sinking away while you’re not using it, which is probably most of the time. Plus, whenever you need to use it, you want to be sure that the knife is there.

A great sheath ideally fits properly on your equipment or body and has sheath retainer – a device that keeps your knife from coming out unexpectedly. If you choose to get a folding dive knife, you will notice most of them come with clips instead.

Pointed or Blunt Tip

This is often a matter of preference, but let’s look at their differences. With dive knives, unlike pocket knives, you don’t necessarily need to have a pointed tip because the knife is rarely used for piercing or stabbing. As such, a blunt knife tip will make your knife much safer in the unstable water environment.

Some people may choose to dive with a pointed blade because it would come in handy during a shark attack. Again, this is a much rarer occurrence, and it’s something you should keep in mind depending on how you plan on using the knife.

Blade Material

Most blades on dive knives are made from stainless steel. However, stainless steel is not rustproof, just rust resistant. This means that after an excessive exposure to the sea water, blades made from stainless steel are prone to rust, which is something you don’t want to happen on your knives. There are higher grade stainless steel blades that can hold up much better in water, so you don’t need to completely rule it out if you spot a great knife that’s stainless steel.

Titanium blades will perform much better underwater environments, because they never rust. The downside is that titanium has a propensity to chip when undertaking certain tasks. There is also the H1 steel, which is a relatively new type of blade steel that’s rustproof. It uses a precipitation- hardened steel, which uses 1% nitrogen rather than carbon. It’s mostly found in Spyderco Knives.

Bring a scuba diving knife

Folding or Fixed Knives

Previously, we would have only recommended fixed blades due to their reliability. However, the recent strides made by folding knives in terms of the steel and materials, make them great options. Folding dive knives can now hold a candle to a lot of dive knives with fixed blades. Nonetheless, they come with an added advantage of taking up less room and being safer to carry around.

In general, if you’re traditionalist, a fixed blade might be the way to go, but today, a folding dive knife is not making anyone fringe anymore, and it should definitely be considered.

Line Cutter

Cutting lines is one of the key uses of a dive knife, especially if you are tangled in a fine line. By itself, a dive knife is capable of cutting a line, but most dive knives feature a notch on the blade specifically designed for this purpose. So, it’s great to have a line cutter on the dive knife for such situations.

Metal Butt

A metal butt on the knife is another great feature to have as it comes in handy when diving with a team. It usually comes as a metal cap at the end of the handle, which acts as a tap hammer – a useful feature when you’re trying to communicate.

Lanyard Hole

Another feature you might want to consider is a lanyard hole. Not every dive knife has it, but it can be convenient if you often find the knife slipping off your hand. Holding the knife with a lanyard around your hand will keep it nearby and handy. It also greatly reduces chances that you might lose the knife during a dive.


Ever noticed that some dive knives are brightly colored? This is not just a fashion statement. Dive knives are highly susceptible to sinking away and getting lost, especially if you often use them under water. Having a handle with vivid accents will ensure that you can see your knife from a distance.

Best Dive Knives Reviews

Here are the best five dive knives we have chosen. Each of them has a variety of functions and comes at a different price range. Our goal is helping you find the best diving knife to suit your needs and budget. We’d love to hear about your experiences with any of these knives or others. Please consider leaving a comment. We appreciate it!

Cressi Skorpion Dive Knife

The Cressi Skorpion is one of our top picks for best dive knives. It’s a very versatile diving knife with the main features most divers look for. It has a serrated back edge for sawing and cutting harder materials, a line cutter ideal for safely and quickly cutting through lines, and a sharp front edge. The knife comes with either a sharp or a blunt tip based on your needs. It also has an economic handle that makes it comfortable to use.

Skorpion Knife

Its thick and robust blade is stainless steel, which is corrosion resistant and easy to sharpen. For the blade you have two options: one, the 420 Japanese stainless steel that’s famous for its razor sharpness and use in the high-end blades, and two, the 304-stainless steel that’s more corrosion resistant. The button lock hard-plastic sheath is well built and does its job well.

As a tip, always remember to rinse it after a saltwater dive with the rest of your diving gear. We liked that the Cressi Skorpion is extremely affordable, making it an attractive option to a wide range of divers.

Promate Titanium Dive Knife

When it comes to manufacturers, Promate is one of our favorites, as they’ve consistently shown that they can make high quality dive knives. The Promate Titanium has a medium-sized (4 3/8) titanium blade that comes in either a blunt or pointed tip. The sharp tip is ideal for stabbing fish, while the blunt tip can come in handy as a tool for prying.

Promate Sharp Tip Titanium Dive Knife - KF593, Blue/Black, Sharp Tip

All the way through, the knife is made from titanium, meaning it’s impervious to rust, and the knife can last for a very long time.  There’s also a hammer nub along the base of the handle, as well as an ankle sheath. The sheath comes with straps you can attach to your leg or arm or in your BC. You can also remove them if you don’t need them.

The blade is half serrated with a line cutter notch along with a half straight edge blade. It’s by far the most popular design for dive knives, and this is for a good reason. The economically designed handle is made from a soft rubber that easy to grip, and comfortable to use. It’s also covered in studs for that extra grip, so it won’t slip while in use.

We think that this is a great knife overall, and we really liked the addition of a hammer nub on its handle.

Atomic Aquatics TI6 Titanium Dive Knife

This is a full-size dive knife that’s lightweight, robust, and works excellently in most situations. It has a very comfortable handle, that makes it feel like the knife is an extension of your hand. The blade comes with a heavily serrated edge, a smooth edge, as well as a line cutting notch. The sheath of the knife is well built, actually better than those of a few knives on this list.

Atomic Aquatics Titanium Ti6 Scuba Diving Knife Blunt and Pointed Tip Dive Knife Options, Pointed

The knife can also be disassembled fully by unscrewing the titanium pommel. This makes it very easy to clean, which can come in handy especially when you plan to use the knife on land. And while it’s very light, the Atomic Aquatics TI6 is very robust, though you wouldn’t want to do heavy prying with it. The knife is an excellent choice for divers who need a full-sized knife that can serve them for a very long time and can do an all-around service.

Cressi Borg Stainless Steel Dive Knife

At first glance, the Cressi Borg seems like a big knife, but once you pick it up you’ll realize that it’s actually a really big knife. At 10.5 inches long, it has a 5.5-inch blade – one of the longest cutting edges of any knives we have evaluated. It is also heavily built with a hammer pommel and a 3/16-inch-thick blade. With such beefy dimensions, the blade is robust enough to withstand any form of abuse from crushing oysters to prying hubcaps.

Borg [Pointed Tip] - Grey

Its stainless-steel blade is also great at cutting through materials, and it easily cuts through pretty much any sort of line in a breeze only hesitating at double cuts through heavy lines. The hard-plastic sheath also did a good job of securing the knife in place, only releasing it with the press on the lock. However, you need to have a long calf to strap it. The handle is also super comfortable, with a nonslip rubber and ensuring it fits well on the hand. In general, this knife is a great value even for those on a budget.

Tusa FK-940TI Dive Knife

This is an awesome allrounder, with a back edge that’s heavily serrated and a front cutting edge that’s wickedly sharp. It also has a line cutter specifically made for cutting through line efficiently and quickly. Its economic rubber grip is among the most comfortable one we’ve come across in a long time. The sheath is made from high quality, hard-plastic material, and comes with a push button to release feature, which keeps the knife safe in place until it’s needed.

TUSA FK-940 X-Ppert II Titanium Dive Knife, Metallic Silver

As a titanium dive knife, it requires a bit more effort to sharpen it, but once sharp it will stay that way for longer, and do a much better job at resisting rust from seawater than the cheap alloy diving knifes. Titanium also makes it extremely lightweight, making it easy to carry around. Its price falls right in the mid-range category, and therefore strikes a great balance between high-end construction and cost.

Which dive knife is the best?

Out of the five blades we reviewed, the Cressi Skorpion Dive Knife is the one we’d recommend. It comes at a very attractive price, considering how extremely versatile it is, and all the features it brings to the table. Having said that, depending on your needs and wants any of these five dive knives is a great choice to make. None of them would by any stretch of the imagination be called a bad knife and as such you can’t really go wrong with either one.

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