JOERIC 9 PCS Black Dry Diamond Drill Bits Set, Hex Shank Diamond Hole Saw Kit with Storage Bottle, for Granite Marble Tile Ceramic Stone Glass Hard Materials (Not for Wood) with Size 3/16'' to 5/8'' - J047

• 🌻Package Includes: 9 Pcs Of Dry Diamond Drill Bits With Different Drilling Diameters, Including2 Pc 3/16" (5mm), 2 Pc 1/4" (6mm), 1 Pc 5/16" (8mm), 1 Pc 3/8" (10mm), 1 Pc 1/2" (12mm) , 1 Pc 9/16" (14mm), And 1 Pc 5/8" (16mm) . Meet the needs of experiencing different drilling. Surface plating can prevent the drill bit from rusting. 🌻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. 🌻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. 🌻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. 🌻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.