Best Dive Knife Reviews 2020

Many divers disregard how crucial it is to have a dive knife with them. Beginners may find this surprising, but the tool is useful in many ways, even for a life and death situation. The best dive knife will keep you company in cutting vegetation, lines, ropes, or any type of material that may trap you underwater.

If you are new to diving, finding the best knife must be one of your preparations. The market has a lot to offer, but not all products are reasonable buys. You must distinguish a product worth buying from the ones that are not.

Best Dive Knife Review

Cressi Borg Dive Knife


This dive knife has a blade length of 5.51 inches. The overall length of the tool is 10.43 inches.

Cressi Borg knife is one of the best scuba knife options with long blades. It is also usable for other purposes such as swimming, spear fishing, and snorkeling. The knife comes from a provider of top-of-the-line products since 1946, Cressi.

Compared to other dive knives, the product is larger in size and has a contemporary design. The blade is made of 420 stainless steel, ensuring that it is resistant to rust. The material is imported from Japan.

It could be used for years, adding to the reliability of the product. The design of the blade is a drop point tip. The knife is different from most since it has a partial side for serrated edge, and another for straight edge structure.

You could obtain Cressi Borg with a line cutter, which is uncommon in dive knives. The handle is perfected with thumb tab, finger grips, and polymer-made material. The knife has a metal bottom that can be converted to a hammer.

Using only one hand, you can already lock the knife. The sheath that comes with the knife is also impact-resistant. There are dual leg straps with the sheath.

The first strap is for your arm, and the second is for the leg. These straps are added to make the placement of tool more reachable and secured.


  • Great grip
  • Dual blade design
  • Has quick release mechanism
  • Includes line cutter and metal bottom
  • Packaged with arm and leg straps


  • Seal between blade and handle is hard to clean.

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Dragon Squama Dive Knife


This dive knife has a dimension of 3.7 inches by 1 inch by 0.1 inch. The cumulative weight of the item is just 5.8 ounces. It has a thickness of 0.14 inches, making it one of the most portable knives available on the market.

Dragon Squama knife is made of two major materials. The blade is 440C stainless steel, which guarantees that the knife will never rust. The handle is ABS plastic improved with shock-resistance.

The dive knife boasts its water drain hole with nylon string. Furthermore, it has an elastic strap that is meant for the legs. You could adjust the placement of the knife for your convenience.

Apart from being used in diving or underwater activities, you may also bring the knife in the forest for outdoor camping, or kayaking, among others. For critical situations, Dragon Squama could quickly be accessed from the strap with the use of its button release feature.


  • Feels balanced on the hand
  • With sheath that holds knife securely
  • Strap that keeps knife fixated on your legs
  • Useful for various applications
  • High-quality paracord wrap


  • Cheap-quality holsters

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Snake Eye Tactical Dive Knife

This product comes with a total length of 8.5 inches. The blade has a length of 4.75 inches. Moreover, the handle is 3.75 inches in length and is made of plastic.

Snake Eye Tactical knife comes with various accessories perfect not only for diving, but also for fishing and hunting. Alongside the knife are a leg strap, sheath, razor edge, and line cutter. The product has a sturdy feel, giving you the confidence that it could cut through several types of materials.

The serrated blade of Snake Eye Tactical makes it more effective in multiple applications. It is almost 100 percent resistant to rust. Although the holder is made of plastic, the material will remain durable after frequent use.

You may use the straps on your thigh or calf depending on the comfort level. These are also designed with locks which are easy to release when you need to use the knife.


  • Lightweight
  • Made of serrated blade
  • Does not rust easily
  • Sheath that is made of strong plastic
  • Medium-sized


  • Reports of quick strap breakage

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Promate Titanium Dive Knife


This tactical knife has a blade size of 4 3/8 inches. Promate Titanium comes with sheath and straps. The product is usable for both snorkeling and scuba diving.

The blade is made of titanium and is attached to a rubber molded sheath. The holder is perfected for easier grip while underwater. You may also keep the knife with you while swimming by using the straps.

You may adjust the straps depending on the size of your thigh. You will not find it inconvenient to attach the knife to your legs since it is very lightweight. The knife is also designed with a bottom hammer made of titanium to sustain communication with your co-divers.

Titanium is selected by Promate since the manufacturer claims that the material is lighter, more durable, and stronger than stainless steel. The blade has enforced corrosion resistance. You simply need to clean and air dry it after use.

Various color combinations under the product are yellow and black; blue and black; and gray and black.


  • Handle designed with rubber grips
  • High-quality sheath latches
  • Does not require further maintenance
  • Secured locking mechanism
  • One-press unlock button


  • More expensive than stainless steel counterparts

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Cressi Skorpion Dive Knife


This dive knife is a recommendable large blade option. Overall, it has a length of 9.5 inches. The blade is over four inches and works similarly to the Borg version under the same brand.

Cressi Skorpion knife comes with a sheath that has a narrow area in the middle for extra grip. However, the handle remains soft and perfectly shaped for comfortable use. The plastic sheath also has a locking mechanism using a button, making it easier for your knife to remain secured on your leg.

The blade has a serrated design, giving you a saw-like advantage in cutting various materials. It is manufactured from 420 stainless steel, guaranteeing rust protection. After using the blade, instruction states to clean it well.

Though longer than other knives, Cressi Skorpion is compact and lightweight. You can use it in scuba diving and spearfishing. It could also be an essential when you are out in the woods.


  • Large but decently constructed
  • Solid sheath
  • Easy to release while underwater
  • Effortless maintenance
  • Performs like Borg


  • Reports of quick rusting

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Types of Dive Knife

There are several types of dive knives you could choose from. This could be carried out by categorizing the product.

  • Straight Edge Knife – This is the type of knives with straight edge blades. These are regarded most useful in cutting materials that are not too thick. It could be functional in getting rid of clumped fishing lines.

According to professionals, you should look for a straight edge knife that has small curves. This attribute will make cutting even simpler.

  • Serrated Knife – This knife is easily recognizable due to its jagged blade. It somehow mimics the appearance of saws or bread knives, but its primary purpose still remains – for diving. This is a considerable option if you want to cut strong materials, ropes, and even fish bones.

Many consider serrated knives since these eliminate the need for frequent sharpening. It remains usable with great performance longer than straight-edge knives.

  • Fixed Knife – This type of knife focuses on the structure of the tool. It does not fold and is commonly covered when being stored. Its blade often extends into the handle.

Fixed knife is a better option if you want larger yet stronger knives. Aside from being used in diving, this type of knife is also valuable in fighting or hunting.

  • Folding Knife – From the name itself, this type of knife could be folded for ease in storage. This is best if you want to remain discreet while carrying the deadly tool. The tool has a pivot between the blade and handle which makes folding possible.

There are various mechanisms available with a folding knife, beginning with the slip-joint system. This is not generally considered a lock, but it somehow serves the purpose. Moreover, there is a lockback which consists of a latch.

  • Neck Knife – This knife is very portable since it could be worn like a necklace. It could be an alternative to pocket and folding knives. It comes in various sizes and styles and is proven lightweight regardless of your brand choice.
  • Blunt-Tip Knife – This knife has a blunt tip which is very effective if you did not bring a screwdriver with you. It is also regarded safer when prying. Recreational divers often use this type of knife.
  • Pointed Knife – This type of knife has a pointed end which is best at butting your preys. If your dives are meant for fishing, this is a great choice.

What to Look For When Buying

Obtaining the best diving knife depends on how wisely you select a product to buy. As mentioned, there are too many knives available for diving. To ensure success in getting the most reliable dive knife, you should prioritize your preferences.

  • Grip – You are underwater, which is why you will not want to accidentally lose grip of your tool in critical times. It is anticipated that water could make anything slippery. The grip of a knife could be determined by material, texture, and shape.

It is best to find a handle with contoured textured. Never buy a knife with a handle that is too smooth. The shape must also be curved for an easier hold.

  • Blunt Tip Knife – Many divers prefer the use of blunt tip knives. These are safer, even in keeping species from getting wounded when you hold it. It will also keep you from accidently stabbing your body.

You must remember that you must not use your knives to stab other divers or destroy the species underwater. Diving has never had the objective of stabbing anything.

  • Length – You have three major choices based on the length of the knife. You have two- to four-inch knives, four- to six- inch, and more than six inches knives. It is best to settle with the medium-sized blades to keep your mobility intact without worrying about losing grip.

You may also use small knives. Nonetheless, you should ascertain that the handle is long enough for you to grip. The large knives are also selected by others, but there is no guarantee that it is easier to use.

  • Sheath – The sheath coming with the knife should prevent your tool from being exposed when not in use. There are reliable sheaths that keep your knife covered and stored without the danger of wounding yourself.
  • Material – You will find knives in either titanium or stainless steel construction. The former is considered almost resistant to rust. There is no carbon in the material, but it could chip if you will utilize it for prying.

If you will use stainless steel, you will encounter either a 300 or 400 series. The first model is considered more protective against rust. The second series is softer but is less resistant to rust.

  • Line Cutter – One of the primary reasons you bought a knife is to cut ropes, lines, and thin vegetations. There are newer knives that come with a specialized line cutter. This is a great feature to have instead of using the knife constantly.
  • Lanyard Hole – There are divers who already lost their knives because of accidental loss of grip. Not all dive knives come with the lanyard hole. You may look for one to keep your tool nearby even if it slips from your hand.
  • Vivid Design – It is best to select knives with high visibility designs. This will make spotting the knife easier in cases of dropping the tool. Find knives with colorful and bright aesthetics.

Safety Tips

The use of both stainless steel and titanium dive knives must be done with due care. Knives are considered deadly tools. Negligence in utilizing the accessory may do more harm than good not only to underwater creatures but to you as well.

  • Do not point the blade – When using the knife, you should point it away from you. This will free you from the dangers of being cut or stabbed accidently. Before cutting lines, ropes, or vegetation, make sure that there is no body part exposed to the tool.

If you have companions while diving, you should ask them to be at a considerable distance before cutting lines. Luring the underwater species away before cutting is also advisable.

  • Never cut things in your hand – If you do not need to hold a certain material while cutting, you should never do so. It is safer not to make your body parts exposed to the blade of the accessory.
  • Sharpen your knives regularly – Before you dive, it is ideal to sharpen the tool. It will be useless if you cannot even cut finer material. However, there are knives that are designed to stay crisp despite frequent use.
  • Avoid being distracted – In a critical time of having to cut materials underwater, you should focus on the work. By getting distracted, you put yourself at the risk of getting stabbed or cut. You may even hurt your companions if the knife unexpectedly slips from your hand.
  • Let the knife fall – If the knife falls from your hand, let it be. Do not catch it, for chances are you will hurt your hand. Given that the knife has a highly visible design, it would be easy for you to retrieve the tool afterwards.
  • Retract or cover blades after use – There are knives that retract its blade automatically after use. However, there are ones that still require covering after use. Ensure that the blades are not exposed before keeping.
  • Do not toss – You may toss the knife underwater, but this would result to finding the tool on the ocean bed. It is best not to do so. It may even cause accidents when you propel it directly to someone.
  • Keep the water environments protected – Dive knives are not made to destroy the ecosystem underwater. You should not use it illegally to hurt extinct species and even coral reefs. Be aware of the regulations in the area, which at times include the prohibition of bringing a knife.
  • Store knives properly – Clean your dive knife after use. If it becomes too dull after rigorous use, you should sharpen it as well. After cleaning a dive knife, you should store it properly, preferably out of reach of most people.


Based on the aforementioned round-up, Cressi Skorpion Dive Knife is obviously the winner. It has all the features you are looking for from a dive knife. It is a blunt type dive knife, made of stainless steel, and perfected with just the right length.

Apart from the fact it is made of stainless steel, the blade is imported from Japan, guaranteeing compliance to stringent manufacturing standards. Though the sheath is made of plastic, it remains durable despite long-term use.

It even comes with a leg attachment, which is what you need to make the knife more accessible while diving. The quick locking and releasing mechanism of the holder even makes underwater activities feel safer with a knife.

The knife is not too large or small. It even has an optional tip type. Relative to the price, it is worth every penny.

Last update on 2021-09-17 at 08:29 / Affiliate links / Images from Amazon Product Advertising API. More info.