[Package Included]7pcs Dry Diamond Coring Bit Kit for Drilling Diameter 1/5 inch(5mm), 1/4 inch(6mm), 5/16 inch(8mm), 3/8 inch(10mm) , 1/2 inch (12mm), 9/16 inch (14mm) and 5/8 inch (16mm)[Wet and Dry Use]Diamond tile drill bits have built-in wax lubricant, which melts and cools the cutting surface when dry drilling; water can be used as an additional coolant to extend the life of the drill bit regardless of wet or dry use[APPLICABLE FOR]Diamond pointed drill bits are made of carbide, specially designed for porcelain, ceramics, granite, marble, masonry, concrete, various types of tiles and stones, note: not suitable for wood[Accessory Tools]The round shank is compatible with most machines, such as hand drills, angle grinders, bench drills, etc.; there are depth marks on the diamond drill bits, which help to measure accuratelyColour: BlackMaterial: diamondPackage Contents:7pcs Dry Diamond Coring Bit KitOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.