Olfa's circle cutter provides clean, perfect circles every time! A must-have product for cutting yo-yo's, Cathedral Windows, Drunkard's Path, etc. Innovative, patented ratchet mechanism is efficient and easy to operate. Cuts circle from 1-7/8" to 8-1/2". Built-in blade cover for safety and a plastic guard that covers the pivot spike when not in use. This ground-breaking rotary circle means no more dragging the blade through bunched fabric or dealing with time-consuming fabric stabilizers! Ambidextrous. Use replacement blades RB18-2.