The basics Circular dual purpose rotary replacement Scallop/Peak blade to produce a scallop or peak pattern on the edge of the material being cut. The benefits This blade is made of high quality tungsten steel for unparalleled sharpness and superior edge retention. The uses Very popular with crafts and memory book development. Also great for use with Polar Fleece! The bottom line For Deluxe 45mm Rotary Cutter (RTY-2/DX).