Cut perfect circles from 1.5" to 8.75". Designed for comfort and ease of use, the patented ratchet handle aligns the hand and wrist to help reduce wrist fatigue associated with cutting in a circular motion. Includes a built-in blade cover for safety, and a plastic guard to cover the pivot spike when not in use. Uses OLFA 18mm replacement blades. Designed for both right- and left-handed use.