Circular rotary replacement blade for 28 mm rotary cutters used for quilting, sewing, and general crafts. Ideal for small-scale projects and tight corners. This blade is made of high quality tungsten carbide tool steel for unparalleled sharpness and superior edge retention. For 28mm rotary cutter RTY-1/G and Deluxe 28mm rotary cutter RTY-1/DX. RB28-10 contains 10 blades in a plastic case.