General description Forged from heat-treated chrome vanadium steel, this 6 Pcs Hex Shank Drill Bit Adapter Extensions set is designed for superior strength and durability. Each adapter features a corrosion-resistant black phosphate coating to prevent rust and corrosion. The different colored rings help you quickly identify the right adapter, making it a perfect gift for fathers, husbands, and DIY enthusiasts. Technical specifications Model: 1/4 inch (6.35mm) Suitable for: 1/4 inch (6.35mm) hex screwdriver Color: Black + Silver Material: Steel Size: Approximately 5.9 x 3 cm Torque: 400 rpm Maximum torque: 10 N/m Length of adapters: 2 x (1/4 x 1/4 x 65mm), 2 x (3/8 x 1/4 x 65mm), 2 x (1/2 x 1/4 x 72mm) Compatibility and accessories Fits universal sockets, impact adapters, and reducers Compatible with pneumatic screwdrivers, electric screwdrivers, air drills, and hand screwdrivers Can be connected to drill bits, rechargeable drills, or hand wrenches Installation Simple connection to a