10 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 1/2”

About this item ?Package Includes: 10 Pcs Of Dry Diamond Drill Bits With Different Drilling Diameters, Including2 Pc 3/16″ (5mm) 3 Pc 1/4″ (6mm), 2 Pc 5/16″ (8mm), 2 Pc 3/8″ (10mm), And 1 Pc 1/2″ (12mm) ; 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.