FAST AND DURABLE DRILLING---The dry diamond drill bit mainly made of high quality diamond and stainless steel, the tip is made of high-hardness emery, the internal cooling wax of the drill can increase the durability and the diamond coating can greatly increase the drilling speed. NO NEED TO ADD WATER---The hexagon shank diamond bit is widely used for granite, ceramics, marble, granite, quartz and other hard materials. With the sealing wax inside, it can easily cut these materials at high temperatures without adding water. DRY CUT DIRECTLY---The dry cut diamond tipped drill bits contains solid cooling wax, which can be melted during dry drilling, cool the cutting surface, absorb and dissipate heat, then effectively prolong the service life of the bit. UNIQUE DESIGN FOR PRACTICALITY---The tail of the drill bit is designed with a hexagonal handle, which is safer to use and easier to disassemble. It is suitable for most hand drills and bench drills, while the shank comes with an expansion joint, so you can add quick connecting rods by yourself. WHAT YOU WILL GET---You can get a 6mm diamond drill bit and an 8mm diamond drill bit, which is individually packaged by a plastic storage box. Two different sizes of drill bits are available to meet your different needs. Length: 64mm Diameter: 6mm/8mm Weight: 9.2g/11.7g Package includes: Dry Diamond Drill Bits 6mm*1 Dry Diamond Drill Bits 8mm*1 portable storage case*2 Scope of Application:Ceramic Tile, Porcelain Tile, Vitrified Tile, Ceramic, Marble, Granite, Microlite, Quartz and other hard materials Not Recommended:Stalinite, Metal, Wood, Plastic