The OLFA 45mm Quick Change Rotary Cutter has an innovative single click blade change for easily changing your rotary blades. The countoured 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 aritst 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 45mm Quick Change Roatart Cutter in Lime Green uses OLFA 45mm replacement blades, which cut up to 8 laywers of cotton fabric.