Designed to drill in multiple materials including brick, limestone, slate, block, tile, metal, cast-iron, wood, drywall, gypsum board, plastic, and marble. High speed steel, carbide tip with diamond-ground, four-facet design with sharp cutting edges for centered starts with no walking and fast drilling. Double-milled flute ensures fast, efficient removal of drilling dust and debris to increase speed and prevent clogging. Compatible with all standard 1/2" and 3/8" chuck drills. Designed specifically for rotary drilling, but tough enough to be used with hammer drills.