Two circular rotary replacement blades for OLFA's popular 45mm rotary cutter used for quilting, sewing, and general crafts. Cuts up to 6 layers of fabric. Blades are made of high quality tungsten steel for unparalleled sharpness and superior edge retention. For Original 45mm Rotary Cutter (RTY2), Deluxe 45mm Rotary Cutter (RTY2DX) and Quick-Change Rotary Cutter (RTY2NS). 2 blades per package. Comes with plastic storage case.