Quantity: 5 pieces Dimensions: length: 65mm/2.56 Hex Socket: 8 mm; Hexagonal shank: 1/4 Magnetic Screwdriver Bits, 8mm 1/4 Hex Driver Bits with Quick Change Slots for Hand Drills/Lithium Drills/Air Drivers/Impact Driver Bits - 5 parts The screwdriver socket adapter sleeve is forged by quenching and high temperature heat treatment, with good wear resistance, high hardness, high torque and corrosion resistance. Magnetic nut driver set for all 1/4 hex shank drills, hand drills, cordless drills, lithium drills, impact drivers, air drills, air screwdrivers, hand screwdrivers, etc. High Quality Magnetic Screwdriver Bits: The magnetic screwdriver bits are made of chrome vanadium steel, forged by quenching and high temperature heat treatment. Has good wear resistance, high hardness, high torque and corrosion resistance Strong Magnetic Socket Adapter: The electric nut driver set has a built-in magnetic core with strong adsorption. Super easy to grip and hold the screws. Provide great convenience for your work Easy-to-use adapter socket: The 1/4 magnetic screwdriver bit is very easy to use and fits a variety of quick-change chucks.