Estwing 42441 Folding Lock Back Utility Knife with Disposable Razor Blade - Walmart.com
IRWIN Folding Utility Knife, Bi-Metal, 6 in Overall Length, Number of Blades Included 1 - 3KJD6|2089100 - Grainger
Milwaukee FASTBACK Folding Utility Knife with Blade Storage & Compact Folding Utility Knife with 2 General Purpose Blades (2-Pack) 48-22-1503 - The Home Depot
REXBETI 4-Pack Folding Utility Knife Quick-change SK5 Box Cutter for Cartons, Cardboard and Boxes, Back-lock Mechanism with 10 Extra Blades - - Amazon.com