Features: Diamond Drill Bit 12mm. Alpen Diamond Drill Bit For Tiles. Water Cooling Is Required Range of Application: - For Extremely Hard Ceramic Tiles, Extremely Hard Roofing Tiles, Marble, Granite, Glass And Porcelain - Suitable For Any Standard Cordless Drill Thanks To Its Standardized Shank Profile - Not Suitable For Percussion Drilling. Water Cooling Highly Required. For Drilling Into: - Ceramic Tiles - Hard Roofing Tiles - Marble - Granite - Glass - Porcelain Art-No. 00 290012001 00 Strengths Diamond - Water Cooling Is Required Deeper - Up To Mohs Or Ritz Scoring Hardness 8 What's in the box 1 x Diamond Drill Bit 12mm