Feature: 1. Hex Shank: The drill bit adopts hex shank, which is suitable for most hand drills, bench drills, the usage is easier and safer, will not slip and fall off 2. Good Heat Dissipation: The diamond hole drill bit has wax inside to absorb and dissipate heat, resulting in faster and cooler drilling performance 3. High Strength Body: The body of the drill bit is forged with high strength metal, which is not easy to deform and can easily open holes 4. Applicable Machine: The brazing drill bit set is suitable for common hand drills and angle grinders on the market 5. Application: This hex shank diamond drill bit set is suitable for porcelain, tile, ceramic, granite, marble, masonry, stone, etc. Specification: Item Type: Diamond Drill Bits Material: Diamond Brazing Drill Bit Diameter: Approx.5mm/0.2in, 6mm/0.24in, 8mm/0.31in, 10mm/0.39in, 12mm/0.47in, 14mm/0.55in, 16mm/0.63in Brazing Drill Bit Working Depth: Approx.42mm/1.7in Shank Diameter: Approx.6.35mm/0.3in Sand Width: Approx.10mm/0.4in Brazing Drill Bit Total Length: Approx.65mm/2.6in, 65mm/2.6in, 65mm/2.6in, 80mm/3.1in, 80mm/3.1in, 80mm/3.1in, 80mm/3.1in. Package List: 1 x 5mm Hex Shank Diamond Drill Bit1 x 6mm Hex Shank Diamond Drill Bit1 x 8mm Hex Shank Diamond Drill Bit1 x 10mm Hex Shank Diamond Drill Bit1 x 12mm Hex Shank Diamond Drill Bit1 x 14mm Hex Shank Diamond Drill Bit1 x 16mm Hex Shank Diamond Drill Bit Note: Please add water when drilling hard granite, do not drill fragile glass, metal, wood.