Features:
4 Blade positions with string cutting feature
Change blades without opening the knife
Thumb rest for greater control
Preferred for cutting and scoring fiberboard, linoleum, wallboard, roofing and many other materials
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-moreout blade storage for easy blade access
3 heavy-duty blades included (Stanley #11-921).
Retractable Blade Positions: 3
Works with most standard utility blades less