The Toolland snap-off knife is a universal snap-off knife with an 18 mm blade that can be easily replaced when it becomes blunt. The blade is designed to snap or "break off" from the tip, revealing a fresh, sharp cutting edge when the current edge becomes dull, allowing you to keep working without having to stop and replace the blade. This type of blade is commonly used for various tasks such as cutting packaging, opening boxes, cutting wallpaper or other general cutting needs.