Dry Diamond Drill Bits Set 5PCS with 1/4 5/16 3/8 1/2 Inch for Granite Ceramic Marble Tile Stone Glass Diamond Coating

Features:
High Quality: High quality full emery electroplating with high temperature quenching and high hardness, sharp and durable.
Solid Cooling Wax: Internal sealing wax treatment, cutting and cooling can be dry, which make it more durable.
Wide Applications: Can be used for granite, ceramic, marble tile, stone, glass, diamond coating and other hard material.
Multiple Sizes: There are a variety of sizes for option, 6/6/8/10/12mm. that is 1/4 5/16 3/8 1/2 inch. You can choose the most suitable one according to your need.
General Round Handle: The bottom of the circular design, a wide range of application, can be used for hand drill and angle grinder.