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.
Can be used with a standard electric drill.
Always use lubrication (water ), otherwise the diamond core drill will burn.
Start your hole diagonally, make a round trace and then hold drill straight.
Size: 6mm outside diameter, 5.4mm shank can drill 35mm depth
8mm outside diameter, 6.4mm shank, can drill 30mm depth.