General description This 6 Pcs Set Twist Drill Bit includes sizes of 3mm, 4mm, 5mm, 6mm, 6.5mm, and 8mm, catering to your daily drilling needs. Crafted from high-speed steel with a Ti coating, these drill bits offer durability, sharpness, and reliable performance for various woodworking tasks. Technical specifications Sizes: 3mm, 4mm, 5mm, 6mm, 6.5mm, 8mm Shank Diameter: 6.35mm / 1/4in Compatibility and accessories Compatible with most power drills due to the 1/4 inch hex shank design. Installation Easy connection to power drills with the hex shank design. Usage Suitable for grooving, drilling, or cutting 1 to 2mm thin wood, hardwood, plywood, MDF, plastic sheet, aluminum, and thin iron sheet.