Cut perfect circles from 1" to 6" in diameter. A center depth indicator shows blade progression for board depths from 1/8" to 1/2". - Logan FoamWekrs Foamboard Cutter - Circle CutterLogan-foamwerks, CIRCLE 1-6 DIA - Cut perfect circles from 1" to 6" in diameter. A center depth indicator shows blade progression for board depths from 1/8" to 1/2". It features a dual inch/metric rail, centering pin, magnetic blade slot, and clear acrylic safety dome. The Circle Cutter includes five blades.Use Replacement Blade A.