A good diving knife is a crucial tool for underwater safety. Whether you’re scuba diving or spearfishing, having a reliable knife can help you in emergency situations and make your diving experience more efficient and enjoyable. In this article, we will explore the top picks for the best diving knife, including options for different needs and budgets.

Key Takeaways:

  • Choose a diving knife that suits your specific needs and preferences.
  • Look for features such as cutting ability, corrosion resistance, and comfortable grip.
  • Consider the primary use of the knife, whether for scuba diving or spearfishing.
  • Budget-friendly options are available without compromising on quality.
  • A reliable diving knife is an essential accessory for underwater safety.

How We Test Dive Knives

To determine the best diving knives on the market, our team conducted a series of tests. We evaluated each knife’s cutting ability, ergonomics, durability, and corrosion resistance.

In terms of cutting ability, we tested the knives’ performance in cutting through various materials such as plastic trimmer line, polypropylene, manila, and twisted polypropylene.

We also assessed the knives’ grips, sheaths, and locking mechanisms to evaluate their ergonomics. Durability was tested through a pry test, and corrosion resistance was evaluated by submerging the knives in salt water.

Cutting Ability Ergonomics Durability Corrosion Resistance
Precision cutting through various materials Evaluation of grips, sheaths, and locking mechanisms Pry test to assess durability Submersion in salt water to test resistance

Results and Recommendations

After conducting extensive testing, we have carefully selected the top diving knives that stand out in terms of cutting ability, ergonomics, durability, and corrosion resistance. These knives have proven to be reliable and efficient tools for divers in various underwater scenarios. Our recommendations are based on their outstanding performance in our tests and positive feedback from experienced divers.

Top Diving Knife Picks

  • Spyderco Salt 2 Green LC200N Wharncliffe
  • Edge Quick Lock Assassin
  • Seac Blunt
  • Seac Devil
  • Spyderco Salt 2 Green LC200N
  • Cressi Kai
  • Edge Quick Lock Hunter

These top diving knife picks have consistently demonstrated superior performance across all key criteria. They provide divers with the necessary tools to handle emergency situations and enhance the overall diving experience.

When choosing the best dive knife for underwater safety, consider your specific needs and preferences. It is important to prioritize cutting ability, comfort, and durability. Remember, the right diving knife can be a crucial tool for ensuring your safety and enjoyment during your underwater adventures.

Spyderco – Salt 2 Green LC200N Wharncliffe

The Spyderco Salt 2 Green LC200N Wharncliffe is a folding knife that offers exceptional performance and durability for diving enthusiasts. Its 3-inch full-flat-ground Wharncliffe-style blade is crafted from nitrogen-enriched LC200N steel, providing unmatched corrosion resistance in marine environments. This makes it an ideal choice for underwater adventures where exposure to saltwater is inevitable.

During our rigorous testing, the Salt 2 Green LC200N Wharncliffe stood out with its impressive cutting performance. The Wharncliffe blade design allows for precise and controlled cuts, making it highly effective in various diving tasks. Whether you need to cut through ropes, lines, or other materials, this Spyderco diving knife delivers reliable cutting power.

One of the standout features of this knife is its secure grip, which ensures a firm hold even in wet conditions. The textured handle provides excellent traction, minimizing the risk of slippage and accidents. This secure grip enhances overall safety and control during underwater activities.

Key Features of the Spyderco Salt 2 Green LC200N Wharncliffe:

  • Nitrogen-enriched LC200N steel blade for superior corrosion resistance
  • 3-inch full-flat-ground Wharncliffe-style blade for precise and controlled cuts
  • Textured handle for a secure and comfortable grip
  • Lightweight and compact design for easy portability
  • Durable construction for long-lasting performance

The Spyderco Salt 2 Green LC200N Wharncliffe is trusted by divers who prioritize both corrosion resistance and cutting performance. Its excellent build quality and corrosion-resistant properties make it a reliable companion for any underwater adventure. Whether you’re a professional diver or a recreational enthusiast, this diving knife is sure to enhance your diving experience.

Edge – Quick Lock Assassin

The Edge Quick Lock Assassin is a short, dagger-like knife with a serrated edge. While it may not excel in cutting ability, it offers excellent sheath security and ease of grip. The knife’s squeeze-lock system ensures a reliable and secure fit in the sheath, and the grip is designed for comfortable handling. It is a suitable choice for divers who prefer a serrated edge and prioritize sheath security.

When it comes to diving knives, the Edge Quick Lock Assassin stands out for its unique design and reliable performance. Its serrated edge is perfect for tasks that require extra cutting power, such as slicing through heavy rope or tangled vegetation. While it may not compete with other knives in pure cutting ability, it compensates with its exceptional sheath security and ease of grip.

The Quick Lock Assassin features a squeeze-lock system that firmly secures the knife within the sheath. This ensures that the knife stays in place, even during vigorous movement underwater. Divers can rest assured that the knife will be readily accessible when needed, without the worry of accidentally losing it.

Another standout feature of the Quick Lock Assassin is its ergonomic grip. The handle is designed to provide a comfortable and secure hold, allowing divers to maintain control even in challenging conditions. This ensures a firm grip, essential for precise cutting and minimizing the risk of accidents.

In summary, the Edge Quick Lock Assassin is an excellent choice for divers who prioritize both sheath security and ease of grip. While it may not have the cutting prowess of some other diving knives, its serrated edge, reliable sheath lock, and comfortable grip make it a worthy companion for underwater adventures.

Seac – Blunt

The Seac Blunt diving knife is a reliable and budget-friendly option that delivers excellent cutting performance. Its smooth cutting edge allows for efficient and precise cuts, making it ideal for various underwater tasks. While it may struggle slightly with twisted poly, it excels in cutting through other materials, providing divers with a versatile tool for their adventures.

Testers praised the Seac Blunt for its ease of use and efficiency in cutting. Whether you need to free tangled lines or handle emergency situations, this diving knife is designed to meet your needs and ensure your safety underwater. Its budget-friendly price makes it accessible to divers on a tighter budget, offering excellent value without compromising on quality.

When it comes to choosing a diving knife, the Seac Blunt is a top contender that combines affordability with quality. With its excellent cutting performance and smooth cutting edge, it’s a reliable tool that won’t break the bank. Whether you’re a beginner or an experienced diver looking for a budget-friendly option, the Seac Blunt diving knife is worth considering.

Seac – Devil

The Seac Devil diving knife is a popular choice among divers for its unique design and functionality. The knife features a uniquely shaped handle with a large central hole that catches onto the sheath’s oval locking tab, ensuring a secure attachment during underwater activities.

However, our testers found the grip of the Seac Devil knife to be uncomfortable, which could affect the handling and maneuverability of the knife. Additionally, they noted that the locking tab did not always engage easily when returning the knife to the sheath, causing potential safety concerns.

When it comes to cutting performance, the blade of the Seac Devil struggled compared to other diving knives. Testers reported that it ripped more than it cut, which could be inefficient and frustrating during underwater tasks.

Despite these drawbacks, the Seac Devil diving knife still performed adequately in our tests. It’s important to note that while it had some corrosion issues, it managed to withstand the demanding conditions of the underwater environment to a reasonable extent.

Key Features:

  • Uniquely shaped handle
  • Large central hole for locking tab engagement
  • Sharp blade for cutting tasks

Tester Feedback: “The Seac Devil diving knife’s handle design is innovative and provides a secure attachment to the sheath. However, the grip could be more comfortable, and the locking tab should engage more smoothly for optimal safety.”

Spyderco – Salt 2 Green LC200N

The Spyderco Salt 2 Green LC200N is an updated version of the original Salt 2 model, featuring a new ultra-corrosion-resistant LC200N martensitic blade. It demonstrated exceptional cutting performance across all test lines and proved highly resistant to rust.

The knife’s lightweight folding design makes it easy to carry and deploy, while the handle offers a comfortable and secure grip. This combination of a sharp blade and a comfortable handle ensures excellent control and precision during underwater tasks.

With its ultra-corrosion-resistant blade, the Salt 2 Green LC200N is perfect for diving and saltwater environments. Whether you’re exploring shipwrecks or diving in tropical waters, this knife will resist corrosion and maintain its cutting performance, even after prolonged exposure to salty conditions.

Additionally, the Salt 2 Green LC200N showcases Spyderco’s commitment to quality and innovation. The brand has been known for producing high-quality knives for outdoor enthusiasts, and this diving knife is no exception. It is a reliable tool that can handle the demands of underwater environments with ease.

The Spyderco Salt 2 Green LC200N offers divers an exceptional combination of an ultra-corrosion-resistant blade, excellent cutting performance, and a comfortable handle. It is a must-have tool for any diver looking for a reliable and durable diving knife.


Blade Material Handle Material Blade Length Overall Length Weight
LC200N martensitic steel FRN (Fiberglass Reinforced Nylon) 3 inches 7.1 inches 2.0 ounces

The Spyderco Salt 2 Green LC200N is a compact and lightweight diving knife that offers exceptional performance and durability. Its ultra-corrosion-resistant blade and comfortable handle make it a reliable tool for any diver. Whether you’re a professional diver or an avid underwater adventurer, this knife is sure to meet and exceed your expectations. Keep yourself prepared and safe during your diving expeditions with the Spyderco Salt 2 Green LC200N.

Cressi – Kai

The Cressi Kai diving knife is a reliable tool designed for underwater adventures. With its skeletonized design and martensitic stainless steel blade, it offers durability and performance in any diving situation. The Kai features sharp and serrated cutting edges, providing versatility for various tasks underwater. Whether you need to cut through ropes, lines, or other materials, this knife is up to the challenge.

Testers have praised the Cressi Kai for its cutting performance and sturdy construction. Its sharp blade ensures efficient and precise cutting, while the serrated edge adds extra functionality when dealing with tougher materials. This dive knife is built to last, making it a reliable companion for divers.

However, some testers did encounter issues with the sheath. The line cutter had a tendency to get entangled, which could potentially be frustrating in emergency situations. Additionally, the snap-button closure on the sheath may not always provide the secure fit desired by divers.

Despite these minor drawbacks, the Cressi Kai remains a powerful and reliable cutter underwater. Its combination of a martensitic stainless steel blade, sharp and serrated cutting edges, and overall sturdy construction make it a valuable addition to any diver’s toolkit.

“The Cressi Kai is a solid diving knife that performs well in various underwater tasks. Its sharp and serrated cutting edges give divers the versatility they need, while its sturdy construction ensures long-lasting use.” – Experienced Diver

Overall, the Cressi Kai diving knife is a great choice for divers looking for a reliable cutting tool. Its martensitic stainless steel blade, sharp and serrated cutting edges, and sturdy construction make it well-suited for a wide range of underwater tasks. While the sheath may have some minor issues, the Kai’s performance and durability outweigh these concerns. Dive confidently with the Cressi Kai by your side.

Edge – Quick Lock Hunter

The Edge Quick Lock Hunter diving knife is a versatile tool for underwater explorations. It features a 5-inch blade made of durable 420 stainless steel, with both serrated and straight edges, allowing for various cutting needs. With its sturdy construction, this knife excels in performance when tested across different materials, proving its reliability in any underwater situation.

The handle of the Quick Lock Hunter provides an excellent grip, ensuring maximum control and precision during cutting tasks. What sets this knife apart is the easy blade flip feature, allowing divers to switch effortlessly between the serrated and straight edges. This feature enhances convenience and reduces the need to carry multiple knives, making it an efficient and space-saving option for divers.

Despite its impressive cutting capabilities and innovative design, testers found that the sheath of the Quick Lock Hunter diving knife could be more secure. They observed that the knife tends to shake loose from the sheath easily, which could be a concern during underwater activities. However, despite this minor setback, the Quick Lock Hunter received positive feedback from multiple testers, highlighting its overall performance and versatility.



In conclusion, a reliable diving knife is an essential tool for ensuring underwater safety. After thorough testing and evaluation, we have determined the best diving knife picks for divers. At the top of our list is the Spyderco Salt 2 Green LC200N Wharncliffe. This knife stands out for its exceptional cutting performance, corrosion resistance, and comfortable grip, making it an ideal choice for divers looking for reliability and efficiency.

Other noteworthy options include the Cressi Skorpion, ScubaPro Mako Titanium, and Tusa X-Pert II. These knives offer excellent features and performance, catering to divers with diverse needs and preferences.

Ultimately, the choice of the best diving knife will depend on your specific requirements. When selecting your dive knife, prioritize features such as cutting ability, comfort, and durability. Always remember to prioritize safety when engaging in underwater activities and enjoy your adventures with confidence, thanks to the right diving knife.


Why do I need a diving knife?

A diving knife is a crucial tool for underwater safety. It can help you in emergency situations and make your diving experience more efficient and enjoyable.

What are the essential features to consider in a diving knife?

When choosing a diving knife, consider features such as cutting ability, ergonomics, durability, and corrosion resistance. These factors will ensure that the knife performs well and withstands the underwater environment.

What materials are commonly used for diving knives?

Diving knives are typically made of stainless steel for its corrosion resistance. Some high-quality options use nitrogen-enriched steel for extreme corrosion resistance.

Can a diving knife be used for spearfishing?

Yes, a diving knife can also be used for spearfishing. It can be useful for cutting lines and ropes or dispatching catch efficiently.

What is the difference between a serrated and a straight edge diving knife?

A serrated edge diving knife is designed for cutting through tough materials like ropes and thick vegetation. A straight edge diving knife is better for precision cutting and general use.

How can I ensure the security of my diving knife while underwater?

Many diving knives have sheaths with secure locking mechanisms to keep the knife in place. Look for knives with reliable locking systems and secure attachment options.

Can I use a diving knife for other outdoor activities?

While diving knives are specifically designed for underwater use, they can be versatile tools to have in various outdoor activities, such as camping and hiking, for tasks requiring cutting or prying.

Are there any legal regulations for carrying a diving knife?

Different countries may have varying regulations regarding the size and carry of diving knives. It’s essential to research and comply with the regulations of your diving location.

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Hello! I'm Wise, a Filipina with a deep love for my country and a passion for sharing its beauty with the world. As a writer, blogger, and videographer, I capture the essence of the Philippines through my eyes, hoping to give foreign visitors a true taste of what makes these islands so special.

From the vibrant streets of Manila to the tranquil beaches of Palawan, my journey is about uncovering the hidden gems and everyday wonders that define the Filipino spirit. My articles and blogs are not just travel guides; they are invitations to explore, to feel, and to fall in love with the Philippines, just as I have.

Through my videos, I strive to bring the sights, sounds, and stories of my homeland to life. Whether it's the local cuisine, the colorful festivals, or the warm smiles of the people, I aim to prepare visitors for an authentic experience.

For those seeking more than just a vacation, the Philippines can be a place of discovery and, perhaps, even love. My goal is to be your guide, not just to the places you'll visit, but to the experiences and connections that await in this beautiful corner of the world. Welcome to the Philippines, through my eyes. Let's explore together!

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