This Impact Socket Magnetic Nut Screwdriver Hex Key Set Drill Bit Adapter is designed for 1/4" Hex Shank Bits, providing versatility for various quick-change chucks, flashlights, and screwdrivers. The bell-shape and magnetic hex insert securely hold the bit in place for efficient installations. Crafted from heat-treated chrome Vanadium steel, this tool offers exceptional hardness, abrasion resistance, and a long lifespan. Suitable for use with pneumatic screwdrivers, electric screwdrivers, drills, and more, this set is a valuable addition to any tool collection.