The OLFA RTY-2/NS Quick-Change rotary cutter is designed for controlled fabric cutting with added safety for everyday quilting, sewing, and crafts. Its 45 mm blade is protected by a split cover so you can expose only the edge you need while cutting strips and shapes, and it is comfortable in either hand. When the blade dulls, follow the two-step change process, use a rotary mat to help protect the edge, and store the cutter with the cover closed.