These IRWIN® Multi-Material Jobber-Length Drill Bits are made with diamond-ground, 4-facet carbide tips with sharp cutting edges to drill through multiple materials at once. Their powerful tips can drill through brick, block, tile, metal, wood, plastic and marble. Each durable drill bit is designed for rotary drilling but is tough enough to be used with hammer drills. The IRWIN® drill bits feature double-milled flutes that help remove drilling debris to prevent clogging.