Circular rotary replacement blade for Olfa's 45mm rotary cutters. Used for quilting, sewing,and general crafts. This blade is made of high quality tungsten carbide tool steel for for,unparalleled sharpness and superior edge retention. Cuts up to 6 layers of fabric.,For Original 45mm Rotary Cutter (RTY-2/G) and Deluxe 45mm Rotary Cutter (RTY-2/DX).,10 blades per pack.