These high-performance Faithfull Tungsten Carbide Tipped Drill Bits fit into SDS Plus chucks which provide a particularly secure non-slip grip that offers maximum power for rotary percussion drilling, especially into concrete. These bits ensure maximum power transmission due to their unique fluted shaft. This effectively removes situations where a serviceable cutting edge is made useless by a worn shank. The SDS Plus system enables faster changing of drills using a quick release keyless chuck. Suitable for use in bricks, blocks, concrete containing aggregates, marble and hard stone, and other hard masonry materials.