This OLFA® EXCEL BLACK™ 12.5mm blade is the only blade in the world developed specifically for cutting wallpaper. It has been designed with a unique 65° angle, which was researched to be the ideal angle for cutting paper against a wall, and getting into corners. The ultra thin (0.25mm) blades will cut even the wettest, pasted wallpaper without dragging or tearing, and more importantly, leave near enough invisible joins. Splicing two layers of wallpaper is a pain with other blades, but these ones make it effortless, and leave results that impress. The 12.5mm EXCEL BLACK™ blade is 0.25mm thick and has 13 snap segments.