6pcs Dry Diamond Drill Bit Set for Granite Porcelain Tile Ceramic Marble Pot Hex Shank Tile Drill Bits 1/4'' 5/16" 3/8" 1/2"

Features:

- The dry drilling diamond drill bits integrated with lubrication which dry drilling and cools the cutting surface.

- Diamond coating enhances the drilling speed, surface plating prevents the drill bit from rusting, with depth mark is useful for precise project.

- 1/4-Inch hex shank designed, which is compatible with electric drill,hand drill,bench drill, angle grinder and vacuum brazed diamond technology provide more serviceable and long life.

- The drill bits can be used without water, because tile dry diamond drill bits integrated with wax lubricant inside which melts while dry

drilling and cools the cutting surface; But water can be used as additional cooling to prolong the life of tile drill bits.

- Suitable for working with such materials as stone, granite, marble, porcelain, ceramic and hard tile(not applicable to wood), intended for both industrial use under hard working conditions and domestic use.