Packaged included:
1 x 15 pieces coated diamond hole saw drill bits

Specifications:
Size: 6/8/10/12/14/16/18/20/22/25/26/28/30/40 / 50mm
0.23 / 0.31 / 0.39 / 0.47 / 0.55 / 0.62 / 0.7 / 0.78 / 0.86 / 0.98 / 1.02 / 1.10 / 1.18 / 1.57 / 1.97 / ""
Quantity: 15 pieces

Characteristics:
- This diamond-coated core drill bit eliminates a complete circle of glass, tiles, marble, granite, ceramic or other.
- Materials and only needs water for lubrication.
-Always use lubrication (water),otherwise the diamond drill will burn.
-Can be used with a standard electric drill.
-Start your hole diagonally, make a round trace and keep the drill straight. "