Features 【High Quality Material】: The nut driver kit is made of chrome vanadium steel material, with corrosion-resistant coating on the surface and ensures a long service life. 【Strong Magnetization Design】: This socket impact drill bits features a strong magnetization design, when used with an impact wrench, strengthens the safety lock and lock of the nut and bolt fasteners. 【Easy to Use】: Our hex magnetic bit set is firmly inserted in the driver and can be used immediately. The hexagonal mandrel is suitable for quickly changing drills and all drills, screwdrivers or screw guns. 【For Electric Drilling Tools】: The total length of the power driver drill bit is 48 mm, and the adapter nut is an M8 hex nut, suitable for electric drill tools. 【Service Guarantee】: We provide 24-hour after-sales service, if you have any questions about the power nut driver, please feel free to contact us, we will try our best to solve your problem. Specification: Item Type: Power Nut Driver Material: Chrome vanadium steel Purpose: Tapping die holder adapter Adapter Handle Type: Hex handle Adapter Handle Size: 1/4in Adapter Total Length: Approx. 48mm / 1.89in Adapter Nut: M8 hex nut Adaptation Tools: Impact wrench, electric drill, etc. Package List: 10 x Power Nut Driver 1 x Storage Box Package List 10 x Power Nut Driver 1 x Storage Box