Description of Acrux7 4-Diamond Electric Porcelain 2-Inch
★Hollow Drill Bit Material: Carbon steel electroplated with nickel. ★Hole Saw Cutter Blade Bound: high quality diamond sand. ★15 Pcs Diamond Hole Saw Cutter Kit, Diam: 6mm(1/4"), 8mm(5/16"), 10mm(3/8"), 12mm(1/2"), 14mm(9/16"), 16mm(5/8"), 18mm(11/16"), 20mm(3/4"), 22mm(7/8"), 25mm(1"), 26mm(1-1/32"), 28mm(1-3/32"), 30mm(1-1/8"), 40mm(1-1/2"), 50mm(2"). ★Applications: Drilling round hole for Glass, Tile Bottles, Blocks Jars, Fiberglass Porcelain Tile Ceramic and so on. It is excellent for making clean and accurate hole on glass and tile. ★Attention: Not for use on Concrete or for depths beyond about 1/2". Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.