Abracs DBG070 4 Point Drill Bit for Tile and Glass 7mm The Abracs DBG070 7mm Drill bit for tile and glass has a 4 tip head for precise, accurate drilling on first contact. The carbide tip also provides precise, non-slip drilling.  Features: 4 tip head for precise, accurate drilling on first contact Titanium coating for increased heat resistance, higher durability and longer life Deep cut flute for stock fremoval and clean holes on deep cuts Quick chuck 1/4\" hex shank for fast, easy and safe bit changes Carbide tips for precise non-slip drilling Specification: Diameter: 7mm Total length: 100mm