Amazon.com: Utility Knife Blades by HEIKIO, Pack of 10 Standard Replacement Blades for Heavy Duty Utility Knives and Box Cutters, Made of Black Carbon Steel, Thicker and Sharper than Normal Silver Blades :
Klever Kutter™ Kurve Blade Plus Safety Cutter, 5.75" Plastic Handle, Orange, 10/Box | Kleen Supply Company
Sheffield 12125 Mini Quick Change Folding Utility Knife, Comes with 6 Mini Blades, Outdoor Knife, Key Chain Utility Knife, Lightweight Cardboard Cutter Tool - Utility Knives - Amazon.com
Trojan Quick Change Retractable Knife With Blades - Bunnings Australia
Trojan Folding Utility Knife - Bunnings Australia
Estwing Utility Knives at Lowes.com
Kincrome 150mm Folding Lock Back Utility Knife - Bunnings Australia