diamond max 5pcs milwaukee drill bits setDiamond drill bits have been developed for professionals who need to drill in hard materials, such as porcelain, stoneware, natural stones, cast iron or fiberglass, where it is very difficult to drill with conventional systems. These crowns guarantee excellent performance and long life even in the hardest materials. CHARACTERISTICS Less water: These drill bits work with little and intermittent water cooling, unlike conventional drill bits that require