This product is specially designed for perforating hard materials, especially tiles and floor tiles made of marble, ceramic, glass mirror. Not suitable for wood. 5 pcs, the quantity fully meets your . The drill bit is made of cemented carbide, made by vacuum brazing diamond technology, and there is special wax for lubrication in the central control tube. Hex shanks are compatible with machines such as hand drills, angle grinders, bench drills. Wet and dry use, water can cool the drill bit and prolong the service life of the drill bit. Bore Size: 6mm,a total of 5 drills. Drilling is smooth; depth marks are useful for precise projects. Each drill is individually packaged to that each drill will not be worn out before use. Be sure to take safety measures when using it to avoid injury. Shank Type: Hex Hole dirll size: 6mm Material: diamond, alloy colour: black Package Contents: 5 x Diamond Dry Drill Bit Only the above package content, other products are not included. Note: Light and