Material: High-quality chrome vanadium steel, Quantity: 8 pieces, 4 x 1/4", 2 x 3/8", 2 x 1/2" Suitable for all socket drives, bit inserts, for direct drive via the drill chuck or with a 1/4" hex mounting bracket For all drills, cordless screwdrivers and hand screwdrivers, etc. Ideal for quick tool changes in electric screwdrivers For a firm hold, the hexagonal shank can also be clamped directly into a machine chuck The hexagonal shank is inserted into the drill, square to accommodate 1/4", 3/8" and 1/2" sockets 8-piece socket adapter set for cordless screwdrivers 1/4", 3/8", and 1/2". Use: A must-have for every DIY enthusiast and craftsman, this adapter set should not be missing from any cordless screwdriver case. The adapters are tailored to high quality standards and can even be used for changing car wheels. The useful adapter set is suitable for all cordless screwdrivers and torque wrenches or cassettes. With these three high-quality chrome vanadium steel adapters, you can use