Change blades quickly no screwdriver required
Three position retractable blade slide
Swingout blade storage magazine
Integrated string cutter feature even when blade is retracted blade does not have to be exposed
Front loading rear blade storage magazine
Toolless blade changing system push button blade change system

Stanley 10499 Utility Knife Quick Change Retractable Overall Length: 63/8 Inch Handle Length: 6 Inch Blade Length: 21/2 Inch Position: 3 Handle Color: Gray Handle Type: Straight Handle Material: Steel Blade Change: Push Button Blade Type: 2Sided Utility Blade Shape: StraightEdged Blade Material: High Carbon Steel Number of Blades: 3