OLFA 12.5mm Blade for Wallpaper Cutter 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. 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.