The basics Easily cut clean, perfect circles out of cloth, paper and more in just one step with this innovative cutter. The benefits 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. The uses Effortlessly cut perfect circles from 1-1/2" to 8-3/4". The bottom line Uses OLFA 18mm replacement blades. Designed for both right- and left-handed use.