22mm (7/8") Diameter Heavy Duty Diamond Segments Core Drill Bit Hole Saw 7/8" (22mm) Diameter, HEAVY DUTY DIAMOND COATED HOLE SAW CORE BIT Size: 7/8" outside diameter, 3/8" shank, 2" cutting depth. Overall Lenght: 3-1/4" Heavy duty diamond coated segment hole saw core bit removes a complete circle Uses: Rock, granite, marble, tile, porcelain, concrete and other materials Always use lubrication (water )