20Pcs 3-50mm Diamond Drill Bit Set Cutter Tool Glass Marble Granite

Description:

Small Resistance: Small incision resistance, opening speed is quickly, easy removal of chips and other advantages.Also help to open accurately. Large chip holes to ensure that when the punching smooth, punching accurate.
Nickel-plated with a diamond dust coating offers superior performance and cutting strength.Extended service life.
Diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.
Can be used with a standard electric drill (not included), Always use lubrication (water), otherwise the diamond core drill will burn. Warnings: Not for use on Concrete or for depths about 1/2"; Water is required for lubrication when drilling.
Start your hole diagonally, make a round trace and then hold drill straight.

Specification:

Material: steel
Color:Silver
Model: 20 Pcs 3-50mm Size: 3/4/5/6/8/10/12/14/16/18/20/22/25/26/28/30/32/35/38/50mm 0.12/0.16/0.20/0.24/0.31/0.39/0.47/0.55/0.63/0.71/0.78/0.87/0.98/1.02/1.10/1.18/1.26/1.38/1.50/1.97 inch
Quantity: 20 pcs

Package Includes:

20 Piece diamond coated bits