FoamWerks Foamboard Cirlce Cutter: Cut perfect circles from 1" to 6" diameters. Center depth indicator shows blade progression for board depths from 1/8" to 1/2". 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-25.