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