This high quality blade is made from tungsten carbide tool steel which will make this optimal for any projects. Great for both cloth and paper which can dull most blades quickly hindering your progress. Its 45mm blade makes it a great tool to help you with your thicker materials causing less pressure on your hand and arm so you can cut for a longer period of time. With Olfa products you expect the highest quality and these blades are well above that standard. Fits any Olfa 45mm Rotary Cutter.