4Pcs Tool Set Dry Diamond Drill Bits Hex Shank Stone Hole Bits for Granite Marble Tile Ceramic Vacuum Brazed HoleOOTDTYfeatures: ● Dry drilling, no need to worry about rhinestones, very convenient● diamond and heat-resistant vacuum brazing is used for fast and smooth drilling● The diamond drill bit contains wax inside, which can absorb and dissipate heat, for faster and cooler drilling efficiency● Porcelain, tile, ceramic, granite, marble, masonry, stone.● The quick-change hex chuck is suitable for most hand drills and bench drills, which is easier and safer, and will not slip or fall offSpecification: Material: Solder Emery Color: BlackSize1: Approx.6x66x34x6mm/0.23x2.59x0.23inchSize2: Approx.8x80x43x6mm/0.31x3.14x0.23inchSize3: Approx.10x80x43x6mm/0.39x3.14x1.69x0.23inchSize4: Approx. 12x80x43x6mm/0.47x3.14x1.69x0.23inchPackage includes: 4 pcs. Hexagon Shank Drill BitsNote: 1. Please allow 1-2mm errors due to manual measurement, please make sure you do not mind before ordering.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.