Universal arbor: 1"/20-mm knock out arbor fits all gas and electric high speed saws, 20-mm bushing is pre-mounted into the 1" hole use as is for a 20-mm arbor or remove bushing for a 1" arbor (once bushing is removed, cannot be replaced)
Concrete: Coarse grit silicon carbide ideal for cutting brick, block, concrete and other masonry products; Typical Applications;