This heavy-duty compass cutter is designed to cut circles from approximately 3" to 12" in diameter; perfect for cutting cardboard, mat board, and thin plywood, as well as, scribing circles necessary for the installation of recessed lighting, cutting wind slits in banners and cutting out small sections of carpet. The snap-off blade allows for a convenient tool-free blade change.Details:Multicolor3" to 12" in diameterExtra-sharp snap-off bladeMultipurposeSuitable for heavy-duty projects