Silverline Diamond Dust Holesaw 22mm
Amazon
Corrosion-resistant, chrome-plated carbon steel Diamond grit cutting edge Cuts ceramic, glass, marble, slate and porcelain Fits all conventional power drills, Weight: 0.06 Pounds, Manufacturer: SLTL4
Electrical WorldFor drilling ceramic tiles, glass, marble, slate and porcelain tiles up to hardness grade 5. For use with conventional power drills.