Stanley Interlock Retractable Blade Utility Knife 10-189C Features: Spring-loaded blade retracts into knife automatically when pressure on slide button is released. Round point blade can be set to 2 different cutting depths. Safety-orange color for high visibility. 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: spring-loaded. Retracts when slide button is released Blades included (11-987): 1 Works with most standard utility blades