5/16" Dry Diamond Drill Bit Set, 10 PCS 8mm Ceramic Drill Bit Diamond Core Drill Bit Tile Drill Bit with Storage Case for Granite Marble Tile Ceramic Stone Glass (Not for Wood)

Dry drilling design: Vacuum brazed 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. Package Includes: 10 pc 5/16" (8mm) hex shank dry diamond core drill bits . Ample quantities, can meet your needs. For different kinds of materials: Diamond core bits are worked great for dry drilling holes through hard porcelain tile, ceramics,bathroom tile,granite & marble, masonry, concrete, glass, hard plastic with ease. Using water could prolong the lifetime. Easy to carry and use: There is a storage bottle packaged together with the porcelain tile drill bits, which is helpful for preventing loss, meanwhile making the bits easy to use and store. Widely compatibility: Diamond coating increases drilling speed of the granite drill bits; hex shank is compatible with most machines, such as hand drills, , table drills; depth mark is also useful for precise projects. ›See more product details ›See more product details