Garvey Cosco EasyCut Self-retracting Blade Carton Cutter - Self-retractable, Locking Blade - Stainless Steel, Plastic - Blue, Black - 1 Each - Office Supply Hut
Klein Tools 44136 Utility Knife, Heavy Duty Self-Retracting Box Cutter and Crafting Knife with No-Slip Grip, Wire Stripping and Lanyard Hole - - Amazon.com
Interlock Safety Utility Knife with Self-Retracting Round Point Blade, 5.63" Metal Handle, Red Orange - Reliable Paper
NSI Sport Self-Retracting Safety Utility Knife - 317878 - Northern Safety Co., Inc.