Regular price
£15.90 GBP
Sale price
£15.90 GBP
Regular price
Knives and Cutting Tools
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Buying guide
Choosing a dive knife or line cutter
Start with the job you need doing. If all you want is to get free of monofilament, netting or a stray shot line, a dedicated cutter like the Beaver Trigger Line Cutter or the Mares Titanium/Ceramic Line Cutter Knife is smaller, faster and less likely to cause a second problem than a blade. If you want one tool that also prises, digs and levers, buy a knife. Then choose the material. Titanium if you would rather not think about maintenance, stainless steel if you are happy to rinse, dry and sharpen. Then choose the tip: blunt if you dive dry, dive a rebreather or work from inflatables, pointed if you want the extra utility. Finally, decide where it will live on your rig before you buy, because the mount dictates the size. Entry-level BC knives and cutters cover the majority of recreational diving perfectly well; the premium titanium models earn their place if you are in salt water constantly. If you are unsure, tell us what and where you dive and we will point you at the right one.
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Read the full buying guide
Frequently asked questions
Which knife and cutting tool brands does Oyster Diving stock?
We stock dive knives and cutting tools from TUSA, Mares, Atomic Aquatics, Beaver Sports, Maniago and DIRZone.
TUSA gives this collection most of its depth, covering both compact BC knives and the full-size X-Pert II family. Mares and Maniago cover leg-mounted knives with rigid sheaths. Atomic Aquatics is the titanium option. Beaver Sports supplies a dedicated trigger line cutter, and DIRZone a stainless knife with a strap-mounted pocket.
Stock moves, so the products showing on this page are what we actually have live.
Should I choose a pointed tip or a blunt tip dive knife?
A pointed tip cuts and pierces, so it doubles as a prising and picking tool. A blunt tip does everything except pierce, which is precisely why many divers prefer one: you cannot put it through a BCD bladder, a drysuit, a lift bag or an inflatable boat by accident.
Our range lets you choose without changing anything else. The TUSA FK910 X-Pert II is the drop point version and the TUSA FK920 X-Pert II is the blunt tip version of the same knife. The Atomic Aquatics Ti6 in this collection is the pointed tip model.
If you dive dry, dive a rebreather, or work off inflatables, take the blunt tip.
Titanium or stainless steel - which blade should I buy?
It is mostly a maintenance decision rather than a performance one.
Titanium will not rust, so it forgives a rushed rinse and suits divers who are in salt water constantly. In this collection the TUSA FK14 Mini BC Knife, the TUSA FK940 X-Pert II and the Atomic Aquatics Ti6 are titanium.
Stainless steel is easier to bring back to a keen edge at home, but it wants rinsing in fresh water and drying properly after every dive. The TUSA FK910 and FK920 X-Pert II, the Mares PURE Dive Knife, the Maniago Torpedo 9 and the DIRZone knife are stainless.
The Mares Titanium/Ceramic Line Cutter Knife sits between the two, pairing titanium with a ceramic cutting element.
Where should I mount a dive knife or cutter?
There are three sensible positions.
On the BCD, where a compact knife such as the TUSA FK14 or FK-10 Mini BC Knife sits on a shoulder strap or a hose within easy reach. The FK-10 ships with a hose adapter for exactly this.
On the leg or thigh, using the rigid sheath and straps supplied with the Mares PURE Dive Knife or the Maniago Torpedo 9. Traditional, and fine for most recreational diving, though a low-mounted knife is harder to reach if you are already tangled.
Clipped to webbing, which is how the Beaver Trigger Line Cutter is designed to carry.
Whichever you choose, the test is the same: you should be able to reach it with either hand, in poor visibility, wearing the gloves you actually dive in.
Can I fly with a dive knife?
Not in your hand luggage. A dive knife, and most line cutters, will be taken off you at security. Pack it in hold baggage, sheathed and buried inside your kit bag.
Some countries also restrict blade length or the carrying of knives generally, so check the rules for your destination before you travel rather than at the airport.
If you fly to dive often, a compact BC knife or a line cutter is far less hassle than a full-size leg knife, and does the job that actually matters underwater.