Circular rotary replacement blades for Olfa's 60 mm rotary cutters are used for quilting, sewing and general crafts. These larger blades are made of high quality tungsten carbide steel for unparalleled sharpness and superior edge retention. Great for cutting denim, canvas and other heavier materials. Olfa 60 mm rotary blades, 5 pack, for the RTY-3/G, RTY-3/DX, and RTY-3/NS rotary cutters.