5 Best Scuba Dive Knives Review

Products Tested
Hours of Research
Reviews Checked
Divers Interviewed

A dive knife is a very important part of your gear, not just for you, but it just might come in handy for a dive partner if you ever get entangled in fishing line or the like. And of course,you would want a scuba knife that you can trust or in other words, the best available. We have done all the work on bladed dive knives and came back with what you are looking for –  Promate Scuba Diving Snorkeling Sharp Tip Stainless Steel Knife.

The Winner

Promate scuba knife bears a very close resemblance to high-shelf dives knives that are on sale for hundreds of dollars. However, it comes very cheap and is a most effective dive knife. 

The blade is made out of 304 stainless steel which is identical to the stainless steel hammer that you would find at the bottom of the handle. It can easily be pulled out of its sheath and is notable for this quick release.

  • It comes with a stainless steel blade
  • Stainless steel hammer present on the handle bottom
  • It boasts of quick release and adjustable straps and sheaths
  • Dissembling process is pretty easy and rapid

Going for a dive without taking a dive knife along can be bad business, especially since it is a source of protection as well as a way to release yourself or underwater inhabitants like dolphins from entanglements.

 However, the process of selecting the best could require some work, especially if you don’t know exactly what to look out for. Given the right tips, the selection process could be quite a breeze and this is exactly what this article is about. 

Come along on a trip to becoming an expert shopper for the best dive knife. 

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Best Scuba Dive Knives

Top 5 Scuba Dive Knives Comparison

Editor's Choice
Promate Scuba Diving Snorkeling Sharp Tip Stainless Steel Knife
Promate Scuba Diving Snorkeling Sharp Tip Stainless Steel Knife
  • Quick release
  • Stainless steel blade
  • Stainless steel hammer on handle bottom
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2Cressi Borg, Long Blade Knife for Diving and Spearfishing Knife
Cressi Borg, Long Blade Knife for Diving and Spearfishing Knife
  • 304 Japanese stainless steel blade
  • Comes With Leg or Arm Straps
  • Incorporated with serrated top blade
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3Atomic Aquatics Titanium Ti6 Scuba Diving Knife Blunt and Pointed Tip Dive Knife Options
Atomic Aquatics Titanium Ti6 Scuba Diving Knife Blunt and Pointed Tip Dive Knife Options
  • Full-tang Titanium blade
  • Quick-adjust sheath straps
  • Serrated edge and large line-cutting notch
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4Cressi Borg, Long Blade Knife for Diving and Spearfishing Knife | Pointed & Blunt Tip
Cressi Borg, Long Blade Knife for Diving and Spearfishing Knife | Pointed & Blunt Tip
  • 304 Japanese stainless steel
  • Ergonomic design
  • Locking mechanism with one-hand release
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Titanium dive knife
Promate Barracuda Sharp Tip Titanium Diving Knife (5-inch)
Promate Barracuda Sharp Tip Titanium Diving Knife (5-inch)
  • Titanium blade
  • Quick release and adjustable straps
  • Hammer on handle bottom
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The promate scuba diving knife has an overall length of about 10.5 inches with the blade measuring only about 5 inches. It is designed so that it can be easily disassembled in the event of your wanting to clean or polish it. 

It comes very cheap and is a most effective dive knife. The blade is made out of 304 stainless steel which is identical to the stainless steel hammer that you would find at the bottom of the handle. It can easily be pulled out of its sheath and is notable for this quick release.

Key Features



Bottom Line

This dive knife is no doubt one of the best on the market and this is evident by its features. It also comes at a very affordable price which is one of the perks of going for this knife.

Another perk is that it is really easy to maneuver which is just about what any diver needs. This appears to be one great purchase choice if you decide to swing this way.


Cressi is another household name when it comes to diving equipment and its touch of quality isn’t lost on the Cressi Borg long blade knife as well. 

This large and powerful knife comes with a futuristic design with one side smooth and the other serrated. The blade is made out of Japanese (304) stainless steel which is indeed a great choice for scuba divers knife material.

This way, the knife doesn’t rust and it is really easy to maintain as well. The handle also boasts of an ergonomic design.

Key Features



Bottom Line

This knife joins the list of some of the best that you would find on the market. It also boasts of some great features as well as high quality materials and a great design. 

At a great price and with amazing recommendations, this knife is one that guarantees great value for your money. This should indeed be a great purchase choice.


This full titanium dive knife is completely corrosion resistant and made out of highly durable materials as well. The Atomic Ti6 is a full tang knife for strength and has an ergonomic design as well. 

The handle is structured so that it fits your hands perfectly and although it is only 4 inches, it comes with both straight and serrated edges with a line cutting notch. This knife is also pretty portable and gets some great points for that.

Key Features



Bottom Line

This is one of the best titanium diving knives that we have on our list. It is no doubt one nice that boasts of top notch quality as well as great features. 

Many a diver have sung the praises of this knife and we are certain that it is indeed very functional. You should get a great deal if you decide to make this purchase.


This is one of the best stainless steel knives on the market, especially if you are partial to blunt tip dive knives. 

The Cressi Borg Blunt Tip Scuba Knife allows you carry out both cutting and chiseling functions without the risk of your dive equipment getting punctured. 

It also comes with a knife sheath that is included for safe handling and storing underwater as well as on land. The 5″ blade features a serrated part for sawing alongside a smooth side for cutting through entanglements.

Key Features



Bottom Line

This knife makes quite a statement and is a lot safer to holster than pointed edge knives. The blunt edge guarantees that no incidence of diving tank puncture or other types of freak accidents. 

Similarly, additional function of serving as a chisel is one that can come in really handy. You should really get value when you spend your money on this knife.


The Promate Barracuda is one that is bound to serve for a very long time irrespective of wear and tear thanks to its durable titanium blade. What’s more, the bottom also features a titanium hammer and all 5 inches of this knife fits perfectly into the black casing that comes with it.

Furthermore, it boasts of a sheathing mechanism that allows for easy release as well as adjustable straps. This is one dependable dive knife and it carries the prominent Promate brand name.

Key Features



Bottom Line

The Promate Barracuda is definitely one great knife that any diver would be proud to have. It does justice to the needs of divers and is designed to withstand a great deal of wear and tear. 

Great features at a great price that guarantees that you will get great value for your money is definitely one option that you want to explore. This should be a great purchase if you decide to tip your scales this way.

How to Choose the Best Scuba Dive Knives - Buyer’s Guide

Scuba diving knives are a very important part of your diving gear and can easily be the reason that you come back up sometimes. Although they aren’t designed for fighting with the creatures underwater, it does come in handy in certain cases. 

Scenarios like getting tangled up in seaweed, being wrapped in a fishing line, or even getting caught in an old net. 

The truth is that you can never tell how important a dive knife is to you, especially if the reason you can’t tell is because you went under and didn’t come back up for lack of a dive knife. 

However, the bottomline line is that exploring the depths without a diving knife isn’t a great idea. So here’s a peek at what to look for when selecting the best diving knife off the market:

Blade Material

Diving blades come in two types of materials, the first is stainless steel and the other is titanium. The main difference between titanium diving knives and steel diving knives is resistance to corrosion.

Titanium doesn’t corrode at all while even the highest quality steel knife would rust after a while. These knives would she regularly exposed to saltwater, therefore, an absence of rigorous maintenance would lead to stainless steel rapidly rusting. 

After every dive, it is essential to wash stainless steel knives in fresh water and dry it. Similarly, coating with a very thin layer of silicone lubricant is a great idea as well. 

This coat would prevent the water from coming in contact with the blade, thereby preventing rust. If you want to do this, you would need to keep up regularly.

Blade Design

The design of the blade goes a very long way in affecting the functionality. This implies that although a simple knife would do just fine, addition of certain other features are bound to make it even better. 

For instance, blades that come with a serrated edge are better at cutting thick ropes underwater than blades that simply come with a regular or traditional edge. 

In addition, a number of diving knives come with a small hook-like cutting shape that is attached to the blade. This attachment is great for cutting through fishing line and monofilament. Of course, the best option is to go for a scuba diver knife that is very versatile. 

Blade Tip 

Dive knives come with one of two very different tip designs. While some blades have a traditional pointed one, others come such a blunt tip. A knife with a blunt tip comes in very handy when there is prying that needs to be done and it can also serve as a screwdriver as well. 

However, when it comes to piercing things, knives with the traditional pointed tips are a lot more preferable. However, certain countries do not allow pointed knives from a particular size limit. Having a knife beyond this size limit could cause quite a stink, especially when you’re traveling. 

Knife Size 

When considering best knives 2020, size isn’t a very important factor when you are under water. Even the smallest diving knife would do, there are really no specifications to knife size. 

Provided you are doing recreational diving only, then you’re good with small sizes. However, you want to keep in mind that.m the handle should be long enough to maintain a very strong grip.  

Frequently Asked Questions

A dive knife that would be used for sport and recreational purposes should have a blade length of about 10-13 inches or 4-5 inches. 

A larger blade might end up getting in the way and being a major nuisance. Keep in mind that the grip and blade should be similar in length.

Three reasons why you might need a scuba knife include: 

  • For survival reasons; fighting off some sea creatures
  • Cutting through cords and lines. It is very possible to get caught in cords or mono-filament lines
  • For freeing trapped aquatic animals.

Apart from grommets, you can use high quality zip ties to attach your dive knife to your bcd

Dive knives are flat so that they can come in handy when prying lightly and it is suitable for use on Abalone shells too.

Titanium dive knives should be sharpened just like any other knife. However, they should be sharpened very lightly so that the edge doesn’t wear out early. 

Ceramics and stones are best for sharpening while you should stay away from honing steels or diamond stones. You should avoid using anything magnetic

Blunt tips are great for digging, chiseling, hacking and prying. Similarly, a blunt tip is very safe as well and there is no need to worry about accidents like puncturing your wetsuit, air hoses or injuring other divers.

There are many ways to make a knife sheath. One great method is folding some webbing in a Z shape with one end longer than the other. 

Next, stitch or glue the edges. This would result in a nice sheath that would fit great on your waist strap.

Dive knives can be worn in different ways.  However, the most popular ways remain attached to your BC, strapped to your leg, or hooked onto your inflator hose.

If you are working with a larger knife, you would wear it strapped to the outside of your thigh or shin.

Criteria We Used for Best Scuba Dive Knives Review


The price is a major determining factor of whether or not you can afford a particular knife. Furthermore, you would definitely want to maximize value while spending at a rate that is super convenient for you. 

This is why we ensured that our blades despite all having great features, could be afforded by a wide range of people. A significant number of knives that we selected would easily fit into a range of budgets. 

We also made sure that whatever price tag was attached to the knife was commensurate to the value that it was offering. 

Customer Reviews 

Reviews are one of the most important aspects when it comes to selecting and reviewing any dive knife or product in general. 

This is because, for the most part, they are testimonies of people who have actually purchased these knives, used them and tried out the various features. 

It is one of the most effective ways of determining products that are actually effective and getting rid of otherwise. This is exactly why we took this aspect very seriously. 

We went through the reviews that had been submitted about the products, selected the highly rated ones, and then conducted our own test do determine how real or genuine that the manufacturer statements were. 

At the end of the day, we emerged with the best rescue knife. 


The material used for making dive knives is one of the major determining factors in the lifespan of such knives.

Therefore, you need to be wary of knives made with low-quality materials or materials that are not very suitable. 

Various materials are used for production or manufacture of knives and you would find some are made of stainless steel. In other cases, you may find knives made out of titanium.

However, the most commonly used material is stainless steel and is pretty trustworthy. So buying scuba fins made of stainless steel from a name brand is a great idea. 


Dive knives a trustworthy companion for every diver, and the absence of one is taking quite a risk.

The Promate Scuba Diving Snorkeling Sharp Tip Stainless Steel Knife is one of such knives that can be relied upon to be very functional under water. 

This is easily proven by a quick study and use of the knife. Getting the best dive knife could be difficult? Well, not any longer, we have taken care of all of that.