Snap-off Utility Knife (18 mm) - DIY (5 blades)

A great tool for making quick cuts into cardboard, foam, plastic, twine and more, the Fiskars® Snap-off Utility Knife boasts eight razor-sharp, snap-off edges in a single 18 mm blade, for a sturdy cutting tool that goes the distance - perfect for complex DIY projects. When a blade edge dulls, all it takes is a simple slide of the lever and a snap to enjoy a fresh, razor-sharp edge. Plus, its hefty, durable handle is sculpted for comfort and enhanced with a rubber grip for added control during cuts that require a little more force. The knife comes stocked with five blades (or 40 edges) that load automatically after the old blade is removed for added convenience. 
A great tool for making quick cuts into cardboard, foam, plastic, twine and more, the Fiskars® Snap-off Utility Knife boasts eight razor-sharp, snap-off edges in a single 18 mm blade, for a sturdy cutting tool that goes the distance - perfect for complex DIY projects. When a blade edge dulls, all it takes is a simple slide of the lever and a snap to enjoy a fresh, razor-sharp edge. Plus, its hefty, durable handle is sculpted for comfort and enhanced with a rubber grip for added control during cuts that require a little more force. The knife comes stocked with five blades (or 40 edges) that load automatically after the old blade is removed for added convenience. 

18mm Snap-Off Knife

6 Reasons Snap-Off Blades May Be a Better Solution for Your Utility

Anybody else prefer utility knives? : r/EDC

Milwaukee Fastback Knife Line and New Snap Off Knives

10PCS 18mm Snap-off Utility Knife Replacement Spare Blades - China Spare Blades, Knife Blades

Dual Blade Utility Knife

[15 Pack] EcoQuality Red Utility Knife Retractable Box Cutter for Cartons, Boxes, Cardboard 18mm Wide Blade Cutter Great for Warehouse, Office, Arts

Fiskars 144720-1001 18mm Snapp-Off Utility Knife : Tools & Home Improvement

Ingco Plastic Snap Off Cutter, 18 mm, Model Name/Number: Hkns 16518 at Rs 75/piece in Kolkata