3/4 inch (20mm) diamond coated core drill bit - for glass, ceramic, marble

Description

3/4 inch (20mm) Diamond Coated Hole Saw Drill Bit This bit can be used on glass, marble, granite, fiberglass, ceramic and porcelain tile. The side hole allows for water to lubricate the inside of the drill bit to insure a smooth and accurate hole. Water lubrication is strongly advised to reduce friction heat. If using a hand drill don't use too much pressure; let the drill bit do the work. 3/4 inch (20mm) 55mm total length 25mm shank length