The Spyderco Assist was designed specifically with emergency, fire and rescue professionals who rely on their knives to function flawlessly under pressure. The Assist from Spyderco features a blunt-tipped VG-1 stainless steel blade with an 80% serrated edge for cutting seatbelts and fibrous material. Above the round thumb hole, a Cobra Hood positions the thumb directly over the hole for quick blade deployment and doubles as a leveraging platform for the thumb. The wavy pattern cut from the top of the blade (created by a fireman from Sweden) and along the inside of the handle let you place a piece of rope (between the half-open blade and handle) and scissor the blade shut- especially convenient for cutting rope in-and-around flesh without having to fully open/expose the knife's blade. The FRN handle is Bi-Directional textured and contours with bulges that ergonomically wrap around your palm. In the closed position, squeeze the blade deeper into the handle and a retractable carbide tip protrudes out from the base for breaking glass. If that weren't enough, the handle has a built-in survival whistle. Reversible tip-up wire clip for carry.