5/6Pcs Efficient Triangle Tile Drill Bits Hexagonal Shank Concrete Glass Hole Opener Ceramic Brick Stone Drilling Power CEmented Carbide Tool Feature: Hard alloy steel is preferred, which has higher hardness and higher wear resistance than ordinary drill bits. Four-blade design, small notch resistance, precise and trouble-free punching. After centerless grinding processing, the surface of the drill body is smoother during drilling and chip removal. The drill shank is cut into a solid hexagon, which makes the electric drill hold tighter and the drilling is not easy to slip. Specification: Handle Type: Hexagonal Handle. Cooling Type: External CoolingTop Angle of Outer Edge: 45°Material: Cemented CarbideHandle Diameter: 6.35mm/0.25inType Drill Working Length: Overall Length4mm/1.6in 35mm/1.4in 70mm/2.8in5mm/2in 40mm/1.6in 76mm/3in6mm/2.4in 42mm/1.65in 77mm/3.03in8mm/3.1in 48mm/1.9in 80mm/3.1in10mm/3.9in 55mm/2.2in 83mm/3.3in12mm/4.7in 55mm/2.2in 83mm/3.3inNote:Lithium drill bits below 24V are not recommended for use and cannot be drilled due to insufficient strength. When the wall is punched, the steel rod must be changed, otherwise the cutting edge will collapse. Glazed bricks, ceramic tiles, and granite must be cooled by adding water. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.5/6 x Hex Drill Bit