Super Strong Heat Treated Chrome Vanadium Steel for Normal & Impact Drivers. Durable,Lasting and easy to use,Lightweight, fast, connect to the standard hex nut drivers, impact hole saws, spade bits and more 105 degrees angle extension, in which you use when you have hard places to get to,360 degree adjustable thumb flange.It can connect hand drill and manual wrench.The function head is equipped with a locking and magnetic device, to ensure that the sleeve does not fall.Built-in strong magnet for good holding power, accepts all 1/4" standard hexagon shank bits.Apply to all electric drill and socket wrench, which allows to reach unreachable or tight spaces. 3Pcs Colorful Socket adapter impact set - 1/4" drive adapter, 3/8" drive adapter, and 1/2" drive adapter and each with a 1/4 inch hex shank driver socket adapter set .Connect impact sockets/socket wrenches/sockets bits/driver sockets to power cordless 1/4 Inch Hex Shank Magnetic Extension Chuck Adapter Quick Release Bar Socket