IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic Router Collet Adapters adapt router bits with 1/4-inch shank to fit on a 1/2-inch router. This adapter is constructed from hardened alloy steel and has a polished finish. It is designed to work with all 1/4-inch shank router bits. The slots in the body of the adapter allow the collet to tightly grip a 1/4-inch round shank. IVY Classic Industries manufactures an extensive line of professional carbide router bits.