The Faithfull Tungsten Carbide Tipped Drill Bits fit into SDS Plus chucks that provide a particularly secure and non-slip grip, transmitting maximum power for rotary percussion drilling, primarily into concrete. Due to their unique fluted shaft, SDS Plus bits ensure maximum power transmission. This effectively removes situations where a perfectly serviceable cutting edge is rendered useless by a worn shank. By using a quick release keyless chuck, the SDS Plus system enables faster drill changes. For use in bricks, blocks, concrete containing aggregates, marble and hard stone, and other hard masonry materials.