Tlily - 6pc Black Dry Diamond Drill Bits Set for Granite Ceramic Marble Tile Stone Glass Hard Materials 5/6/8/10/12mm

Improved dry drilling: Diamond drill bit built-in with wax lubricant inside that melts during dry drilling and cools the cutting edge; The can be used as additional cooling to extend the life of the drill bit. The plating can prevent the drill bit from rusting Application: The dry diamond drill bit can be applied to drill clean holes in hard materials, which is especially suitable for tiles, porcelain floor, ceramic, glass, marble, stone, masonry, brick, etc. Note: Not applicable to wood. Wide compatibility: The black diamond drill bit is designed with a hexagonal shank, which is compatible with most machines, such as hand drills, angle grinders, bench drills, can also be matched with side flutes to help clear debris and drill smooth and fast holes; The depth mark is also helpful for precise project. Shank: Hex Shank Color: Black Material: Diamond Coated, Alloy Package Contents: 4 x 3/16 inch (5 mm) Diameter Diamond Drill Bits 2 x 1/4 inch (6 mm) Diameter Diamond Drill Bits 2 x 5/16