Brassed Diamond Drill Bit, Dry Tile Drill Bit, Tile Drill Bit for Granite Marble Glass Concrete Hard Material, Multifunctional Dry Hole Opener [Diamond Core Drill Bit] Diamond dry drill bit The bit is made of high quality electroplated gold steel grains, with high fire resistance at high temperatures, high hardness, sharpness and durability. The diamond dry drill bit is filled with cutting glue, so there is no need to spend preparation time for additional cooling (such as wet drilling). Thanks to the high quality material processing, you can work with a higher drilling speed and a longer service life. p> [High Quality Material] The gold plated diamond drill bit for tile is made of high quality gold sand steel, with wear resistance, durability and long service life. The diamond dry drill bit is a practical tool in service life, with high hardness and sharpness. [Scientific Design] Scientific design chip removal makes the dry tile drill bit more stable without making it dry and dusty.