The Foam Board Circle Cutter by FoamWerks can cut perfect circles from 1" to 6" (2.5cm to 15.25cm) diameters. Center depth indicator shows blade progression for board depths from 1/8" to 1/2" (3.1mm to 12.7mm). Features dual inch/metric rail, centering pin, magnetic blade slot and clear acrylic safety dome. The circle cutter includes five blades. Use replacement blades WA-5 or WA-20.