Tac-Force Speedster TF-760 brass knuckles with disappearing knife, well sharpened blade in 7cr17 black steel reinforced with single and corrugated carbon wire. The opening is automatic through a lever that makes the blade come out laterally with a click, and is equipped with a safety blade lock. The handle is made of metal to be used as a classic brass knuckles, and ergonomic and non-slip for a firm grip with a metal belt clip. This instrument can be used like a normal knuckle-duster, with the blade closed, like a knife, with the blade open or at the same time double-use knife and brass knuckles. High quality self-defense tool or a valuable piece to add to your collection. Produced by Tac-Force USA.