• Set of 6 HPMAISON diamond drill bits for drilling granite, ceramic, porcelain, marble, stone, hard tiles, and glass • Drill bits with wax lubricant inside that melts during dry drilling, helping to cool the cutting surface • Special coating that prevents oxidation, improves cutting speed, and extends the lifespan of the drill bits • For optimal use, it is recommended to start drilling at a 45° angle and raise the bit to the vertical position • Compatible with most drills and machines, such as hand drills, angle grinders, and bench drills • Sturdy round shank and side grooves that facilitate debris removal and allow for efficient drilling • Includes 3 drill bits of 6 mm, 1 of 8 mm, 1 of 10 mm, and 1 of 12 mm, all stored in a transparent plastic box for added convenience