SDS-Max bits are carbide-tipped bits used for drilling holes in concrete, brick or block base material. The tip of the bit is made out of carbide. The SDS-Max carbide-tipped bits are used in large electro-pneumatic hammer drills. The SDS-Max bits are attached to the electro-pneumatic hammer drill via a keyless chuck. Our SDS-Max bits are American made from premium quality steel and carbide. The SDS-Max bits are available in diameters from 3/8" to 1-1/2" and lengths up to 48".