A dive knife is a general tool and safety device.
In the latter case, you use it in the unlikely, but possible, situation that you’re entangled and need to free yourself.
A dive knife is not a weapon!
A diving knife should have a sheath for mounting it on your equipment or body.
The sheath must hold your knife securely, yet allow you to release and secure it with one hand.
Some sheaths come with straps to allow you to wear it on your leg or BCD.
Most diving knives are made of stainless steel, but titanium dive knives, although more expensive, last a lot longer, unless you lose it.
Larger knives usually have a metal handle butt which can also be used as a hammer.
This comes in handy if you need to get your buddy’s attention by banging on your scuba tank.
This isn’t a common feature on small, compact knives because they’re too small for pounding.
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