[Product Contents]: 7-Piece Ball-End Hex Shank Screwdriver Bit Set (Includes: 1 bit each of H2mm, H2.5mm, H3mm, H4mm, H5mm, H6mm, and H8mm); Shank Specification: 1/4-inch (6.35mm) Hex Shank; Length: 4 inches (100mm); Offers 7 different ball-end sizes to meet your diverse application needs. 【Unique Design】: Universal 1/4"HEX Shank design, compatible with most 1/4 "screwdriver tools. Magnetic ball head design, can absorb screws and other small metal parts, more convenient to use. High-quality Materials】: This ball end drill bit magnetic is made of S2 alloy steel material, with High hardness, impact resistance, not easy to break, wear resistance, strong and durable; Surface sandblasting treatment, embroidery resistance and corrosion resistance, can be used for a long time. 【Wide Range Of Uses】: These Ball End Hex Head Screwdriver Bits Set are suitable for use with a wrench screwdriver head with a 1/4 inch hex shaft and can be used with power screwdrivers, hand screwdrivers, power drills, and other general purpose tools. 【 Worry-Free After-Sales 】: Feel free to contact us if you have any questions about our products. We are sure to give you a satisfactory solution. Wish you a happy shopping!