Aircrew Survival Egress Knife
The serrations seen on Aircrew Survival Egress Knife (ASEK) are intended to allow air crewmen to cut their way free through the relatively thin metal skin of a crashed helicopter or airplane. Those knives that do include functional saw-teeth still suffer from lack of blade length, limiting the thickness of what can be cut when used as a saw.
Read more about this topic: Survival Knife
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