1 set Hot 11 pcs. 3-14mm Diamond Core Drill Bit For Glass Marble Tiles Material: Alloy Color: As Picture Shown Feature: Description: Suitable For Use In Hole In Glass, Marble, Ceramic Or Granite This Diamond Core Drill Bit Removes The Complete Circle Of Glass, Tile, Marble, Granite, Ceramic, Or Other Materials And Only Requires Water For Lubrication Can Be Used With Standard Electric Drill (Not Included) Always Use Lubrication (water), otherwise the core of the diamond drill bit will burn Start your hole diagonally, do a crawl round, then hold the straight drill bit Total 11 different sizes 3mm / 4mm / 5mm / 6mm / 7mm / 8mm / 9mm / 10mm / 11mm / 12mm / 14mm Quantity: 11pcs Note: please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 11 Pcs Diamond ceramic drill bit for hole drilling