Rock Carbide SDS+ hammer bits are suitable for drilling in concrete, masonry, artificial stone, and rock. The carbide tip maximizes carbide surface contact for longer bit life and a 4-flute design cleans debris out for fast, efficient drilling. Pilot point tip starts on contact for greater accuracy. These bits fit into standard 3/8" and 1/2" chucks. Set includes 1 each: 3/16 x 6-1/2", 1/4 x 4", 1/4 x 6", 3/8 x 6", and 1/2 x 6".