FEATURES: Durable, all-metal knife body construction. Quick one-button blade change - No Tools Required. Interlocking nose design helps secure blade and helps prevent body separation. Integrated string cutter when blade is retracted. Comes with hang-hole for adding a wrist strap or lanyard. Swing-out blade storage for easy blade access. Utility Blades Included (11-921): 3. Retractable Blade Positions: 3. Works with these standard Stanley utility blades (11-911, 11-921, 11-931, 11-961, 11-983). Works with these Stanley ASB utility blades (11-937, 11-939, 11-987).