Klein Tools Utility Knife 44308 Auto Loading Retractable Cutter (10 Blade Dual Sided Magazine Straight Hook Blades Drywall Carpet Roofing Support) Vises The Freud 40 106 1 3 4 inch diameter The Freud 40 106 1 3 4 inch diameter 45 degree chamfer router bit eases sharp workpiece edges Perma SHIELD Non Stick Coating: Protective thermal coating shields the bit from heat buildup this knife holds five standard straight utility blades on one side of its magazine and five hook blades on the other for rapid switching between general cutting and specialty roofing tasks An auto reloading slide mechanism automatically feeds a fresh blade into the carriage upon fully retracting and ejecting a worn blade