Silverline Diamond Dust Holesaw 6mm

Amazon

Corrosion-resistant, chrome-plated carbon steel Diamond grit cutting edge Cuts ceramic, glass, marble, slate and porcelain Fits all conventional power drills, Weight: 0.0220462262 pounds, Manufacturer: SLTL4

Electrical World

For drilling ceramic tiles, glass, marble, slate and porcelain tiles up to hardness grade 5. For use with conventional power drills.