6-pc 3/16 Dry Diamond Drill Bits, Ceramic Granite Marble, hex shank,

6-pc 3/16 Dry Diamond Drill Bits, Ceramic Granite Marble, hex shank, with case. VACUUM BRAZED DIAMOND - The high-quality diamond particles are uniformly welded to the drill head using a brazing process to ensure long-term use. DRILLING WITHOUT WATER - The inside of the drill bit fills with cooling wax. So you can drill directly without adding water for cooling. The bit is suitable for drilling in places where it is inconvenient to add water, such as high places or places with wires. QUICK RELEASE - Standard 1/4 hex shank can lock into quick-change chucks of impact drills and electric screwdrivers easily and securely, improving your work efficiency magnificently. MULTI SURFACES PROVED - Great for drilling clean holes on hard materials like tile, porcelain, granite, ceramic, glass, mirror, marble, stone, masonry, brick, etc. 6PC SET - The set includes six pieces of 3/16 Inch dry diamond drill bits. They're in a portable storage case for convenient use and storage.