Homeco Design Carpet and Quilting Knife with Stainless Steel Rotary Built-In Blade Retraction, Multiple Layer Cutting, Durable Construction Ergonomic, it's perfectly curved handle allows comfortable handling and easy single hand operation Safety mechanism, to prevent accidental cuts, it automatically retracts its blade when not in use Sharp rotary blade, effortlessly cut through 5 layers of fabric into strips or blocks for any patter Great on all fabrics, use the same knife to cut carpets and make quilts with a variety of fabrics Non-corrosive stainless steel rotary blade mounted on a sturdy plastic frame and durable