Skip to content

Choosing The Right Dive Knife: A Guide To Blade Types, Handle Materials, And More

Key Takeaway:

  • Blade type is important: Different blade types serve different purposes. Pointed tip blades are suitable for piercing and cutting, while serrated edges work best for sawing through tough materials. Choose a blade based on the activities you plan to use it for.
  • Handle material affects performance: The handle material determines the grip and comfort of the dive knife. Common materials include rubber, plastic, and metal. Consider your diving environment and personal preference when choosing a handle material.
  • Maintenance is crucial: Proper maintenance of your dive knife ensures longevity and performance. Rinse and dry the knife after each use, keep it sharp with a honing stone, and store it in a dry and ventilated place.

Are you a diver? Hunting for the best knife? If so, you’ve come to the right spot! This guide will tell you about the different types of dive knives. Plus, it will also explain handle materials and other factors to consider. Don’t worry, making an educated decision won’t leave you feeling regretful.

Why Choose the Right Dive Knife

Choosing the right dive knife is an essential aspect of any professional or recreational scuba diving experience. In this section, we’ll discuss why choosing the right dive knife is paramount to diver safety, and how it can be an invaluable tool in a variety of underwater situations.

We’ll explore the critical importance of having a dive knife underwater and how it can help prevent dangerous entanglements, as well as the safety benefits of a proper dive knife. Additionally, we’ll consider the pros and cons of different types of dive knives and the best situations for their use.

Importance of having a dive knife underwater

Dive knives are a must for any pro or recreational diver. They can cut through fishing lines, nets, seaweed and other blocks which could be a risk to a diver’s safety. So, having the ideal knife is essential in emergency cases.

When selecting a dive knife, consider factors such as blade type, handle material and mounting options. It might seem overwhelming, but buying guides can help make a wise decision. Medium-length blades of stainless steel, titanium or alloy work best, as they’re corrosion-resistant.

Dive knives come in various shapes and sizes, like serrated or straight edge, pointed or blunt tip and even tango tip for spearfishing. Folding knives are great for air travel, while compact ones are suitable for line-cutting.

Also, look out for sheath type and mounting options, blade grip and if there’s a line-cutter notch. Other cutting tools like shears and EMT Shears are also popular amongst divers.

In conclusion, picking the right dive knife is a big job that cannot be taken lightly. Though Crocodile Dundee makes it look easy, careful thought of blade grip, blade type and handle material is required. Whether it’s a mini dive knife or a medium size one, having the right features can make a difference in emergency cases.

Safety benefits of a proper dive knife

A dive knife is a must-have safety device for scuba divers and snorkelers. It can make a huge difference in emergency underwater situations. You must understand how to pick the right dive knife for safety. Here are some things to think about:

  • Knife terminology: Learn the different terms related to dive knives, such as straight edges, serrated edges, chisel tips, and sharp tips.
  • Blade material: Choose knives made from durable, high-quality, and corrosion-resistant materials. Jay Fisher handmade custom knives are a popular option for their premium quality and customization.
  • Blade length: Medium-length blades are great for most sport and recreational divers. You can pick a folding knife, such as the Ocean Design Predator SQR 420 SS Dive Knife, or one with a fixed blade, like the Trident BC Titanium Knife.
  • Line cutting tool: Have a line cutting notch or blade on your dive knife. Great options include the Ocean Design Apollo SQR 420 SS GB Dive Knife, Tusa X-Pert II Titanium Dive Knife, Mares XR Hand Line Cutter Ceramic in Pouch, and M-Cut HRC52 Titanium Safety Knife Line Cutter.
  • Strap and handle: Look for knives with finger grips and comfortable handles, like the Reef Line Single Blade Line Cutter with Sheath. Plus, some knives come with a metal handle butt that can be used to break glass or other materials in an emergency.

Once you choose the right knife, it’s your job to keep it sharp, clean, and stored correctly.

Blade Types

When it comes to selecting the perfect dive knife, the blade type is a fundamental consideration. In this section, we will explore the different types of blades available, each with unique features that suit various diving needs.

First, we will examine the straight blade, which is a simple and versatile option for divers. Next, we will review the serrated blade, which can handle tougher materials with ease. Along with each type, we’ll outline the pros and cons and best situations for use. This guide will help you choose the right blade type for your diving needs.

Straight Blade

Straight blade dive knives are great for divers and snorkelers. They resist corrosion and are a versatile choice. A medium length blade is suitable for most underwater tasks.

The Trident Stainless Steel EMT Shears in Pouch is a popular option. It has a straight blade and can cut through various materials. Mini dive knives with straight black blades are also available. When shopping for a dive knife, it’s important to invest in a high-quality product.

A straight blade dive knife is an excellent addition to dive or snorkel gear. It allows the user to cut through a range of situations.

Pros and cons

Choosing between a straight blade or serrated one for your dive knife? Pros and cons of each must be understood. Let’s take a look!


  1. Versatile – cut through fishing lines, nets, seaweed, etc.
  2. Precise – sharp edge, simple design for precise cuts, even hard-to-reach spots.
  3. Corrosion-resistant – material resists saltwater, other elements.
  4. Compact – medium or compact size, easy to carry.


  1. Responsibility – handle with care, sharp edges can be dangerous.
  2. Limited effectiveness – serrated blades may be better for tough materials.
  3. Less safe – sudden movements can cause accidents.

When selecting a straight blade dive knife: corrosion resistance, handle material and size must be considered. It’s essential to practice safe diving and regularly care for the knife in case of an emergency.

Fun Fact: 645 people in the US die each year from accidental drowning. It’s a leading cause of death for children and young adults.

Best situations for use

Choosing a dive knife with a straight blade is a common and versatile option for medium-sized blades. It is highly resistant to corrosion, making it perfect for use in saltwater environments.

This straight blade can be great for:

  • – Spearfishing – stab and hold fish easily.
  • – Cutting fishing lines/nets – quickly cut through if entangled.
  • – Emergency situations – able to cut through debris or ropes.
  • – General diving – pry open shells, scrape/clean surfaces, dig through sand.

When selecting, think about the material of the blade, the handle and the design. Look for stainless steel or titanium blades for maximum corrosion resistance, and handles that offer a secure grip in wet/slippery conditions. A straight blade dive knife is the perfect choice for any dive or snorkeling experience.

Serrated Blade

Serrated blades are great for medium dive knives! They have teeth-like edges so they can saw through things like ropes and branches. Plus, they won’t rust or break even if they’re exposed to saltwater. When selecting a dive knife, think about the blade type, handle material, length, and weight. It’s important to get the right blade type for your diving needs. A quality blade is essential for any scuba diver.

Pros and cons

When it comes to dive knives for scuba gear, serrated blades are a popular pick. Here are some things to bear in mind before selecting one:


  • Serrated blades can easily saw through thick ropes, fishing lines, and other underwater debris.
  • They have pointed teeth in various directions, making them versatile.
  • The teeth grip the material being cut, offering more control.


  • They are harder to sharpen than straight-edged blades.
  • The exposed teeth make them more prone to rust and corrosion.
  • Not suitable for multi-purpose use.

When choosing a dive knife, consider usage and tasks. For cutting thick materials like ropes and lines, a serrated blade is great but needs plenty of upkeep to avoid corrosion and stay sharp. Keywords: corrosion-resistant, scuba gear.

Best situations for use

Serrated dive knives are great for slicing through tough materials like rope, netting, or kelp. Their sharp, tooth-like edges make them ideal for cutting stubborn obstructions fast. In murky or low visibility water, these knives require less force, helping you to conserve air and energy.

When choosing a serrated dive knife, pick one with a corrosion-resistant blade made from titanium, high-grade stainless steel, or ceramic. These materials can withstand the harsh conditions of saltwater, reducing the chance of rust or deterioration. A non-slip grip handle made from rubber or Kraton can give you a firmer hold and better control underwater.

Pro Tip: After each use, rinse your serrated dive knife with fresh water and dry it properly. This will prevent corrosion and extend its lifespan. Following these tips can guarantee a reliable and long-lasting serrated dive knife for all your underwater adventures!

Handle Materials and Grip

When it comes to choosing the right dive knife, the handle material and grip are important factors to consider. In this section, we will take a closer look at two common types of handle materials – rubber grip and metal grip – that are popular among divers. We’ll explore the pros and cons of each material, as well as their unique features and benefits that can enhance your diving experience. Whether you’re a beginner or an experienced diver, this guide will help you weigh your options and make an informed decision for your next dive knife purchase.

Handle Materials and Grip -Choosing the Right Dive Knife: A Guide to Blade Types, Handle Materials, and More,

Image credits: by David Arnold

Rubber Grip

A rubber grip handle for dive knives is a wise choice. It offers a secure and comfortable grip, even when wet. Ideal for saltwater environments, it’s corrosion-resistant. The handle is just as essential as the blade type.

Here are the advantages of rubber grip handles:

  • Non-slip hold: The rubber texture provides a great grip, even when your hands are wet or wearing dive gloves.
  • Comfort and longevity: The soft and pliable rubber handle is comfortable and absorbs shock/vibration from the blade. It’s also durable, perfect for regular use.
  • Resists corrosion: This material is suitable for dive knives as it does not corrode in saltwater or corrosive substances.

In conclusion, when selecting the right dive knife handle, consider aspects such as material, texture, and size. Comfort and safety should be your top priorities. A rubber grip handle has it all: a non-slip grip, comfort, durability, and corrosion-resistance.

Pros and cons

Rubber grips on dive knives have advantages and disadvantages. Consider these:


  1. Non-slippery: Rubber handles give a secure grip even in wetness or with gloves.
  2. Shock absorption: These handles cushion some shock, making the knife comfy for extended use.
  3. Floatable: These handles are naturally buoyant, making it easy to get if dropped underwater.
  4. Corrosion-resistant: Certain rubber handle materials resist corrosion and lengthen the knife’s lifespan.


  1. Durability: Rubber handles may be prone to wear and tear, thereby reducing the grip.
  2. Few options: Compared to other materials, rubber handles usually have limited colors and designs.
  3. Smell: Over time, rubber handles can produce an unpleasant odor.

When selecting a dive knife, consider the pros and cons of different handle materials. Think about budget, preference, and intended purpose. This will help you make an informed choice. Note: picking the right blade type, material, and handle will make sure the knife lasts and works well underwater.

Best situations for use

Rubber grip dive knives are great for certain underwater scenarios. The non-slip and comfortable handle make them easy to use in wet conditions. Plus, they’re often corrosion-resistant – ideal for saltwater diving. Here are some situations where rubber grip diving knives really shine:

  • Saltwater diving: The corrosion-proof grip protects the blade from rust.
  • Wreck diving: The grip stays firm, even when wet – a must for hazards.
  • Spearfishing: You won’t drop the knife when cutting free a catch.
  • Underwater photography: Keeps a tight grip when clearing obstructions.

If you need a knife for wet conditions, with a comfortable handle and good grip, go for a rubber grip dive knife. Great for saltwater diving!

Metal Grip

Choosing a dive knife? Handle material and grip are key. Metal is a popular choice, especially for saltwater dives. It offers many benefits – corrosion resistance, lightweight, durability and a non-slip grip.

Titanium and stainless steel are great metals for dive knives. They are strong, durable and rust-resistant.

A mini tip: rinse your dive knife with fresh water before use. Dry it off too. This keeps it in good condition for longer and adds to its reliability when diving.

Pros and cons

Metal grip dive knives can be a great choice due to their durability and versatility. Plus, stainless steel is resistant to corrosion in saltwater. However, they can be heavy and costly. Also, stainless steel can still rust if not taken care of. When deciding on a knife, these pros and cons should be considered.

Best situations for use

When it comes to diving, a corrosion-resistant metal grip dive knife is the wise choice. Saltwater can cause corrosion, so this type of knife is designed to withstand it. It’s ideal for activities like saltwater diving, spearfishing, wreck diving, and even training.

Wreck diving often involves sharp objects, which can damage gear or injure divers. A durable and tough blade material like stainless steel can offer safety and security in these environments. Plus, it can free a speared fish from the spear without rusting or losing its edge.

To keep your dive knife in top condition, remember to rinse and dry it after each use. This makes the metal grip dive knife a great tool for any diver!

Size and Length of the Blade

Choosing the right dive knife can make a big difference in your underwater experience. One important aspect to consider is the size and length of the blade. In this section, we will explore the pros and cons of different blade sizes, and the best situations for each size. Whether you are looking for a compact and versatile option or a larger and more powerful one, we will guide you through the important factors to consider when choosing the right blade size for your dive knife.

Pros and cons of different blade sizes

When picking a dive knife, size and length of the blade are essential. Here’s pros and cons of different blade sizes:

  • Small (3-4 inch): Lightweight and easy to control. Perfect for cutting fishing line or kelp. Requires frequent sharpening though. Stainless steel blades in this range are lightweight, rust-resistant and give tight-space cuts.
  • Medium (5-7 inch): Balances maneuverability and cutting power. Can handle heavier jobs, like thick rope or netting. May be bulkier. Titanium blades in this range are lightweight, rust-resistant, durable and strong.
  • Large (8-10 inch): Good for tough materials like thick ropes or metal. Bulky and hard to maneuver though. 8-10 inch stainless steel blades are great for heavy-duty tasks – rust and corrosion-resistant, durable, strong, and can cut through almost anything.

For your blade to last longer, use corrosion-resistant materials like stainless steel or titanium.

Best situations for use

Choosing the right dive knife is key. Carefully consider size, length and material to pick the suitable type for maximum durability and reliability in harsh underwater conditions. Here are important situations where a corrosion-resistant dive knife is essential:

  1. Scuba Diving – Cut through fishing lines, kelp and other obstructions.
  2. Snorkeling – Need a small and compact dive knife with corrosion-resistant blade.
  3. Spearfishing – Larger and heavier blade that can penetrate the fish’s body.
  4. Free Diving – Wetsuits, ropes and tangled lines can be a threat. Use a stainless-steel blade that resists rust and corrosion, plus a blunt tip to cut entanglements without injury.

Always remember to pick a dive knife that is durable, corrosion-resistant and has a secure grip. This ensures safety when exploring the underwater environment and an enjoyable, safe diving experience.

Personal preferences and needs

Choosing the best dive knife for yourself is all about personal preference and need. There are factors like the type of diving you do, the environment and your comfort level with different blades and handle materials.

Blade types are important; straight-edge, serrated and combination blades are all options. Serrated blades are good for cutting through marine growth and thick ropes/lines. Combination blades offer versatility.

Handle materials like plastic, rubber and metal are common. Plastic or rubber is light and corrosion-resistant. Metal handles are tougher and more robust.

Blade length, thickness and sheath type also factor in. Shorter blades are easier to manoeuvre in tight spaces, while longer blades are good for larger objects. Corrosion-resistant materials are essential for saltwater diving.

In the end, try out various options to find what works best for you.

Budget considerations

Choosing a dive knife? Budget matters! High-end options are out there, but you can find a quality one at an affordable price. Remember: a dive knife is a safety tool, so don’t skimp on cost.

Look for stainless steel or titanium blades. These materials resist corrosion and are comfy to grip. Plus, a blunt-tip dive knife is cheaper than a pointed-tip one. If you prefer the latter, opt for a smaller blade size.

When selecting, consider features such as blade type, handle material, and length. That way, you can find the right knife for your needs and budget. Clean and rinse it after each use, too, to prevent corrosion and make it last longer. Dive with confidence, knowing you have a reliable companion!

Summary of the main points

In the end, you must evaluate multiple factors to pick the right dive knife. Firstly, decide between a straight or serrated blade, or a combination of both. Serrated blades are great to cut through tough materials, while straight blades are better for general use. The handle material should be comfortable to grip, non-slip, and durable. Examples include plastic, rubber, titanium, and stainless steel.

Serrated knives work amazingly on tough materials like rope, while straight blades are great for general cutting. Choose materials that resist corrosion, such as titanium or stainless steel, especially if you plan to use it in saltwater.

Consider your diving needs, budget, and preferences when picking a dive knife. For any scuba diver, a quality dive knife is a must for safety and convenience during underwater activities.

Some Facts About Choosing the Right Dive Knife: A Guide to Blade Types, Handle Materials, and More:

  • ✅ The type of blade needed for a dive knife depends on the environmental conditions and the intended use of the knife. (Source: Scuba Diving)
  • ✅ The two main blade types for dive knives are serrated and straight edge. (Source: DIVE Magazine)
  • ✅ Handle materials for dive knives include titanium, stainless steel, and molded plastic. (Source: Sport Diver)
  • ✅ Factors to consider when choosing a dive knife include size, weight, and attachment options. (Source: Dive Training)
  • ✅ Dive knives can be used for self-defense, cutting fishing lines, and emergency situations. (Source: Underwater Kinetics)

FAQs about Choosing The Right Dive Knife: A Guide To Blade Types, Handle Materials, And More

1. What are the advantages of a corrosion-resistant dive knife?

A corrosion-resistant dive knife offers significant advantages over regular knives. It is made from materials that can withstand exposure to saltwater and moisture, which makes it durable and long-lasting even in harsh environments. This type of knife can resist oxidation and prevent rusting, making it a reliable tool that can withstand the rigors of diving and other outdoor activities.

2. What are the different types of blade materials used in corrosion-resistant dive knives?

The most common blade materials used in corrosion-resistant dive knives are stainless steel, titanium, and ceramic. Stainless steel is an affordable option that offers good corrosion resistance, while titanium is more lightweight and durable. Ceramic blades are incredibly sharp and resistant to corrosion but can be brittle and may not be suitable for heavy-duty tasks.

3. What are the different handle materials used in corrosion-resistant dive knives?

The most common handle materials used in corrosion-resistant dive knives are rubber, plastic, and stainless steel. Rubber provides excellent grip and is comfortable to hold, while plastic is lightweight and can offer good grip as well. Stainless steel handles are durable and resistant to corrosion, but may not be as comfortable to hold as rubber or plastic handles.

4. What are the different blade types used in corrosion-resistant dive knives?

The most common blade types used in corrosion-resistant dive knives are straight blades, serrated blades, and combination blades. Straight blades are ideal for cutting through thick objects, while serrated blades are useful for cutting through ropes and other fibrous materials. Combination blades typically have a straight edge and a serrated edge, providing the best of both worlds.

5. How do I choose the right blade length for my corrosion-resistant dive knife?

The blade length you choose for your corrosion-resistant dive knife will depend on your needs and preferences. For most diving tasks, a blade length of 3-5 inches should be sufficient. If you need a longer blade for heavy-duty cutting or chopping, you may want to choose a knife with a blade length of 6-8 inches. Keep in mind that longer blades may be more difficult to maneuver in tight spaces.

6. Do I need to maintain my corrosion-resistant dive knife?

Yes, it is important to properly maintain your corrosion-resistant dive knife to ensure that it remains in good condition. After each use, rinse your knife with fresh water and dry it thoroughly to prevent corrosion. You should also periodically inspect your knife for any signs of damage, such as chips or cracks in the blade or handle. If you notice any damage, replace your knife immediately.