Works better with an electric drill, Material: Diamond;Corresponding Inside Diameter: 4.12mm, 5.78mm, 7.58mm, 9.46mm, 11.20mm, 13.32mm, 14.90mm, 17.28mm, 19.16mm, 22.28mm;Specifications : 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22mm 25mm(Outside Diameter);Suitable for tiles, ceramics, glass , granite, etc;Make sure you keep drill bit wet during drilling to get maximum life.

• SkyQ Diamond Coated Core Drill Bit Tile Marble Glass Ceramic Hole Saw Set 6mm-25mm(Outside Diameter) Pack of 10

SkyQ Diamond Coated Core Drill Bit Tile Marble Glass Ceramic Hole Saw Set 6mm-25mm(Outside Diameter) Pack of 10SkyQ Technology