Key-ring tether attachment point in knife body. Durable, all-metal knife body construction. Machine screw firmly holds knife body together - screwdriver required for blade change. Contoured handle and textured, die-cast body for slip resistance. Interlocking nose design helps secure blade and helps prevent body separation. Comes with hang-hole for adding a wrist strap or lanyard. Auto-retracting blade is spring-loaded. Retracts when slide button is released. Works with most standard utility blades.