SONIC MASONRY DRILL BITS
Sonic's(TM) advanced flute design clears-debris faster, keeping cutting tip coolerIndustrial tungsten carbide cutting tip -resists wear & breakage for maximum durabilityFully ground, heat-treated body handles shock-and stress of cutting concrete, stone, tile -granite & other masonry materials3/8" size & above have ground 3-flat shanks1/2" Shank