12 pieces a set diamond drill bits, hole saw core drill style bit.
12 Sizes: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 22mm, 35mm. 40mm, 45mm, 50mm.
Application: Drill Glass, Tile Bottles, Blocks Jars, Fiberglass Porcelain Tile Ceramic, Slate Mable, Granite Light Stone.
SPEED KILLS: Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.
Warnings: Not for use on Concrete or for depths beyond about 1/2"; Water is required for lubrication when drilling.