Masonry Drill Bit, 1/4" x 4" Carbide Tipped, Industrial Pro(R)  :  Masonry Drill Bit, 1/4" x 4", Industrial Pro? carbide tipped fractional masonry drill bit that is hand welded and shock proof with highly abrasion resistant tungsten carbide tip, nickel plating and bright finish. Rated for hammer drill use. Ideal for drilling tile, brick, masonry, cinder block, marble, stone, concrete, plaster, etc. Fits portable hammer and standard power drills and drill presses. The slow spiral and wide flutes are designed for improved cutting and dust removal.