Ask any diver what their most prized possession is under the water, and most of them will tell you it’s their dive knife. These tools can be used to rap on their tanks and get their friend’s attention or to cut them free from the line and other obstructions that occur under the water.
The importance of this tool means that finding the best dive knife is essential for anyone who likes to head underwater. Finding the dive knife best suited to your needs is a must have for divers, so we’re here to help make that search a little easier with this comprehensive buying guide.
Best Titanium Dive Knife
Best Dive Knife For Spearfishing
Best Mid-Range Dive Knife
Best Affordable Dive Knife
Our Picks For The Best Dive Knife
We’ve searched far and wide to find the best scuba dive knife on the market, including the best budget dive knife and the best one crafted from titanium. These are the top rated products around today and those that guarantee you peace of mind when you’re enjoying your favorite hobby under the water.
Best Titanium Dive Knife: Tusa Imprex X-Pert II
For many divers, they’ll trust nothing less than a sturdy titanium knife for diving and our top pick is the Tusa Imprex X-Pert II. Made with 6-4Ti you’ll never have to worry about corrosion or rust and it’s a knife that will serve you well for years.
This is the newer design from Tusa with some notable upgrades that make it easier to handle. You’ll get an ergonomic grip on the handle and a counterweight, so those who used the previous model will feel instantly just how much better it is. It is very competitively priced even when compared to traditional stainless steel dive knives - that’s pretty good value for a titanium knife of such strength.
Although the handle has been upgraded, there were some reviewers who felt it was a little flimsy. When compared to the previous model, users said that the new handle was lightweight and didn’t feel like it was a quality build, so this is something to be cautious of if you like a sturdy feel.
This is like a two for one deal because not only do you get the quality titanium knife with a serrated edge but also a line cutter. Both items will be stored away in the sheath which operates with a simple single button release so you can get to it in a hurry. The strap and buckle can be adjusted to suit your needs so it’s not a one size fits all approach.
Best Dive Knife For Spearfishing: Cressi Lima Knife
If your favorite underwater activity is spearfishing, your knife needs may be a little different. The Cressi Lima Knife is the best dive knife spearfishing option on the market and it’s full of extra features that make it a dream to take out on your next expedition.
The blade on this knife measures around 2.95” with a total length of 6”3. It’s small and compact but powerful enough to cut through anything, making it a great choice for spear fisherman. If you favor something small without bulk, this is a great option even if you’re not into fishing.
You’ll be able to connect your life to a CBD or gauge hose, depending on what you take under the water. There’s also a sheath with a locking mechanism that you can place somewhere on your person, and with a one hand release, you’ll be able to use it no matter the situation. Some have found the locking mechanism to be a little flimsy, so be sure to test it out before you get into the water.
This is a super affordable knife from a well known brand that has served many loyal divers for years. If you need something compact and easy to use, but with enough strength to cut through whatever you need, the Cressi Lima Knife is a nice little addition and one of the best spear dive knife options we’ve found.
Best Mid-Range Dive Knige: Cressi Borga Knife
Another addition to the list from Cressi, but this one a little more powerful and costly. The Cressi Borga Knife is made for all kinds of underwater activities including swimming, diving, snorkeling, spear fishing, and more.
Although it’s not titanium, the Japanese 304 stainless steel used in its construction is seriously tough. Many reviewers claim they’ve had a Cressi for years without a failure so you’ll have the peace of mind you need when you invest in this one.
On one side of the blade, you’ll find a straight edge and the other serrated. This gives you more options under the water depending on what you want to cut. This is a larger knife than most and not for those who want a compact feel, with its measurements of around 10.5” for the entire piece and blade.
Some people weren’t fans of the sheath and found it was hard to get the knife in and out of first. When using this knife, or any other dive knife for that matter, you should always test out its retrieval before getting in the water to make sure it doesn’t cause any problems.
Cressi is a leader in dive knives and the Italian brand has been around since 1946, which is evident when you look at the construction of this one. Although a little more expensive and bigger in size, you’ll never worry about a thing when you have this strapped to your leg and just within your reach thanks to the one-handed retrieval.
Best Cheap Dive Knife: Boffer Scuba Diving Knife
Dive knives aren’t that expensive usually, and considering they last for many years it’s an investment that no diver should be without. However, if you’re looking for something very friendly on the budget or just a backup dive knife, the Boffer Scuba Diving Knife might be just what you’re after.
There’s no better quality knife out there for this low price and it’s a lot more than you’d think. Not only do you get the knife, but also two sheaths with adjustable straps, including nylon and elastic for greater security. You’ll be able to strap it virtually anywhere you want on your body, including arms and legs, so it’s up to where you feel most comfortable.
The blade is 3.85” and the handle is 4.13”, so it’s not exactly a compact knife but also isn’t too large. Although this knife is made with 420C steel this isn’t stainless steel, so don’t expect it to last for years of use in saltwater. Rather, it should be kept as a backup knife to take out with you every now and then.
The quick release button and sheath on the Boffer Scuba Diving Knife is better than expected and actually higher quality than some of the more expensive knives. This means you’ll get it out in no time and don’t have to worry about fumbling around when time is of the essence. Although cheap, this makes a great back up to keep for emergencies and won't have you crying when you lose it or when it starts rusting.
What To Look For When Shopping For A Dive Knife
The best-rated dive knife will differ for each person, but shopping for this important tool means knowing a little more about its features. These are some specifications you might come across when choosing your next knife:
The length of the knife includes the handle and blade. Where you wear it and what you’ll be using it for will determine what length you need. There are compact knives and larger ones so consider where you’ll be carrying yours and what use it will have to decide which is best.
The two main materials are titanium, which is corrosion free and durable, or stainless steel which is a bit cheaper. Anything less than these will usually rust easier and not last as long.
There are different types including shears, dive tools, and dive knives all with different tips and purposes. Looking for the best folding knife usually isn’t ideal as this type of design isn’t great for emergency situations.
Serration isn’t always standard on knives so it will depend on what you plan on cutting and using it for.
Buckle And Strap
A sheath for the knife will be attached to you using a buckle and strap and there are different varieties depending on where on the body you want to carry it.
Shopping for your next dive knife shouldn’t be hard work once you equip yourself with some knowledge on what matters under the water. Our top rated knives will serve you well in all kinds of scenarios, so be sure to check them out when you’re looking to invest in a quality dive knife that will accompany you under the water for years to come.