3 Review(s)

? 15 Sizes: 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 26mm, 28 mm, 30 mm, 40 mm, 50 mm.? Suitable for use in drill hole on glass, marble, tile ,blocks jars, fiberglass porcelain tile ceramic, slate mable, granite light Stone etc. Will work with all electric drill and impact drill.? Side holes help to remove the waste material easily; And surface nickel plating, extend the service life, enhance the surface corrosion resistance.? Simple operation, start your hole diagonally, draw a round track and then keep the drill straight. In the process of opening the holes to continue adding water for cooling.? When cutting hard materials it is important to ensure the cutter is kept cool to avoid damage to the material being drilled and premature wear of the cutter;