Dry Diamond Drill Bits Set, 5 Pcs Tile Drill Bits for Porcelain, Ceramic, Granite, Marble, Stone, Glass Hard Materials, Round Shank 1/4", 5/16", 3/8", 1/2" Drill Bits, with Storage Case 5 Pcs Diamond Bits

Worry Free: This Diamond Drill Bits set comes with a portable storage case for convenient use and store. If you encounter any problems in using the products, please feel free to contact us for satisfactory customer service. Unique Details: Diamond coating enhances the drilling speed; Round Shank compatible with most machines such as Hand Drill, Bench Drill; Side flutes help to remove debris and drill holes smooth and fast; Depth mark useful for precise project. Dry Drilling Design: Diamond Drill Bit integrated with wax lubricant inside which melts while dry drilling and cools the cutting surface; Water can be used as additional cooling to prolong the life of the bit. Diamond Coating: Great for drilling clean holes to hard materials especially tiles, porcelain ground, granite ceramic glass mirror marble stone masonry brick. Add Versatility to Your Tool: 5 Pieces of Dry Diamond Tipped Drill Bits Kit for tile drilling holes with diameters of 1/4 inch(6mm), 5/16inch (8mm), 3/8inch (10mm) and 1/2inch (12mm);.