From the Manufacturer: 1. The end of this drill bit is grooved, so the diamond coating has better adhesion for longer life 2. The side hole allows water to lubricate inside of the drill bit to insure an absolutely smooth and perfect hole 3. This bit can be used on glass, marble, granite, fiberglass, ceramic and porcelain tile Specifications: 1. Chuck Size: 3/4" 2. Lenght: 2"(50mm) Includes: 1 x Diamond Drill
- Chuck Size: 3/4" ; Length: 56mm / 2.2"
- The end of this drill bit is grooved, so the diamond coating has better adhesion for longer life
- The side hole allows water to lubricate inside of the drill bit to insure an absolutely smooth and perfect hole
- This bit can be used on glass, marble, granite, fiberglass, ceramic and porcelain tile
- Package Content : 1 x Diamond Drill
- Chuck Size: 3/4" ; Length: 56mm / 2.2"
- The end of this drill bit is grooved, so the diamond coating has better adhesion for longer life
- The side hole allows water to lubricate inside of the drill bit to insure an absolutely smooth and perfect hole
- This bit can be used on glass, marble, granite, fiberglass, ceramic and porcelain tile
- Package Content : 1 x Diamond Drill