Stanley - BOS10788 Durable, 6-1/2" InstantChange Retractable Knife delivers ultimate precision for a variety of tough cutting tasks. Cast metal housing survives tough environments while the integrated bi-material panels provide a reliable secure grip. Curved handle molds to hands for a comfortable, controlled grip during heavy-duty cutting applications. Padded thumb rest allows added precision during cutting. For convenience and speed, the knife is designed with swing-out blade storage for convenient blade access and a quick-change blade mechanism. Three-position retractable blade slide allows you to set a desired length of stainless steel blade exposure for safe cutting. For added versatility, the integrated string cutter safely cuts string with the blade fully retracted. Oversized lanyard hole offers an extra level of security when working off ladders or to easily store on pegboard. Knife uses heavy-duty utility blades.