DISSTON COMPANY 282319 MM1/4x13 Perc MAS Bit Master Mechanic, 1/4" x 13", rotary percussion, carbide tipped masonry drill bit, BLACK oxide, standard shank, beveled edge, negative point provides faster penetration when used with hammer drill or drill in percussion mode, BLACK oxide surface finish with deep, heat treated flutes, recommended for drilling cinder block, common hard brick, plaster, ceramic tile, glazed tile wet or dry concrete, moderate use in marble, granite concrete over 6000 PSI, Carded. Features Double reinforced with industrial grit glue for increased life durability Easy to use Manufactured in China USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.