SDS 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 carbide-tipped bits are used in electro-pneumatic hammer drills. The SDS bits are attached to the electro-pneumatic hammer drill via a keyless chuck. Our SDS bits are American made from premium quality steel and carbide. The SDS are available in diameters from 5/32" to 1-1/4" and lengths up to 36".