4pc Prem Perc Masonry Bit Set

Rock carbide tip maximizes carbide surface contact for longer bit life. Four flute design cleans debris out for fast, efficient drilling in applications such as drilling small diameter holes in masonry, concrete, rock, and artificial stone; three flats on shank eliminate bit slipping in chuck. Includes: 3/16"x3", 1/4"x4", 5/16"x6", and 3/8"x6".