Product Review

Diamond coated Drill Bits, are professional hole saw tools, also called Diamond Core Drill Bits, Diamond Hole Saws or Bonded Diamond Drill Bits.
They are often widely used to drill kinds of hard stuffs like glass,tile, glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, granite, light stone, fiberglass and so on.

Description :
Material: steel
Good Performance and long life.
Excellent for making clean and accurate hole on glass and tile.
Works better with a electric drill (Excluding in the item).
Size(outside diameter): 6mm, 8mm, 10mm, 14mm, 16mm, 18mm, 22mm, 35mm. 40mm, 50mm.
Total length: about 5.5cm

Standard form & Use note:
1.Start your hole diagonally, make a round trace and then hold drill straight.
2.Always use lubrication (water), otherwise the diamond core drill will burn.
3.Low drill pressure and increased use of water lubrication will extend drill bit life considerably.
4.Not for use on Concrete or for depths beyond about 1/2".