20mm (3/4") Diameter Diamond Coated Core Drill Bit
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.
20mm (3/4") outside diameter
8mm (5/16") shank
35mm (1-3/8") depth
Always use lubrication (water), otherwise the diamond core drill will burn.
Start your hole diagonally, make a round trace and then hold drill straight.
( GLS - 309 )