7PCS Dry Diamond Drill Bits Set, Diamond Core Drill Bits for Tile Ceramic Marble Porcelain Stone Glass Hard Materials (not for Wood) Round Shank 1/4, 5/16, 3/8, 1/2, 9/16 inch.

【Durable & Efficient 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.The Larouoba ceramic tile drill bits are extremely heat resistant and efficient due to their special cooling wax filling.
【Diamond Drill Bit Packaging Includes】7 Pieces of dry diamond drill bits Kit for drilling holes diameter of 2pc 1/4 inch (6mm), 2pc of 5/16 inch (8mm), 1pc of 3/8 inch (10mm), 1pc of 1/2 inch (12mm), 1pc of 9/16 (14mm).
【Unique Cooling Wax】Diamond Drill Bit integrated with wax lubricant inside which melts while dry drilling and cools the cutting surface. This allows for longer drilling without much wear on larger projects.
【Widely Application of Various Materials 】Larouoba Diamond drill bit C45 tool steel gives the diamond coated drill bit set robustness. It can be used for porcelain, ceramic, granite, marble, masonry, concrete, various types of tile. (Note: not for wood).
【Applicable To The Machine】Round shanks are compatible with most machines such as hand drills, angle grinders and bench drills. Wet and dry use, water can be used to cool the drill bit and prolong the service life. Please NOTE that you need to reduce the speed when drilling the glass, about 800-1000RPM.

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