6 Size Extension 1/4 Hex Screw Socket Screwdriver Bit Holder Magnetic Impact Driver Drill Bit Adapter Quick Release Power Tools

[Features]: 1. Various lengths are available , meeting different work requirements. 2. Style A has a magnet inside the interface to hold the screwdriver head. 3. Style B is non-mangnetic, it has a marble inside the interface that holds the drill bit in place, preventing it from falling off. 4. Universal hexagonal shank , applicable to screwdriver bits of power tools such as drills, electric and pneumatic screwdrivers, and batch heads, etc. Expandable. 5. Unlimited uses for automotive, hardware, hobby, home and more. 6. fast, tightening; more effective work efficiency.