[6 Pcs Set] This set includes twist drill bits in sizes of 3mm, 4mm, 5mm, 6mm, 6.5mm, and 8mm, catering to your daily drilling needs. [Hex Shank Design] With 1/4 inch hex shank design, these twist drill bits are compatible with most power drills, providing easy connection. [Ti Coated HSS Material] Crafted from high speed steel with Ti coating, these twist drill bits offer durability, sharpness, and reliable performance for various woodworking tasks. [Efficient Drilling] The drill bit features 135 degree split point, can prevent walking during drilling, the sharply edges ensure quick and efficient drilling. [Versatile Applications] Suitable for grooving, drilling, or cutting 1 to 2mm thin wood, hardwood, plywood, MDF, plastic sheet, aluminum, thin iron sheet, etc. Item Type: Twist Drill Bit Material: High Speed Steel Size: Approx. 3mm / 0.12in, 4mm / 0.16in, 5mm / 0.20in, 6mm / 0.24in, 6.5mm / 0.26in, 8mm / 0.31in Shank Diameter: Approx. 6.35mm / 1/4in 6 x Twist Drill Bit