The OLFA 45mm Quick-Change Rotary Cutter has an innovative single click blade change for easily changing your rotary blades. The contoured handle with integrated finger groves, and easy-to-use blade cover is great for both right- and left-handed users. Whether you are a quilter, garment sewer, cosplay artist or general crafter the Quick-Change handle is great for cutting a variety of materials such as fleece, felt, cotton, wool, foam, paper, corrugate and more! The RTY-2C/LGR (45mm) uses OLFA 45mm replacement blades, which cut up to 8 layers of cotton fabric.