15 piece set includes Size: 6/8/10/12/14/16/18/20/22/25/26/28/30/40/50mm
This diamond coated core drill bit removes a complete circle from glass, tiles, marble, granite, ceramic or other.
Materials and only needs water for lubrication. Always use lubrication (water), otherwise the diamond core drill will burn.
Can be used with a standard electric drill.
Start your hole diagonally, make a round trace and then hold drill straight.