Circular rotary replacement blade for 18 mm rotary cutter used for quilting, sewing and general crafts. Perfect for intricate and detailed cutting, this blade is ideal for small-scale projects, and for cutting curved pieces and tight corners. And, it's sharp enough to handle the toughest material. This blade is made of stainless steel for sharpness and durability. For use with rotary cutter RTY-4 and rotary circle cutter CMP-3. RB18-2 contains 2 blades in a plastic case, blister packed.