1Extend To Narrow Space: This adapter can be connected to a rechargeable electric drill or manual wrench, extend to a narrow space that they cannot reach, and tighten screws and nuts 21/4in Hex Shank: 1/4in hex shank quick connect handle is suitable for all electric drills and socket wrenches 3Locking And Magnetic Device: The functional head is equipped with a locking and magnetic device to ensure that the socket will not fall 4Chrome Vanadium Steel Material: Made of good quality chrome vanadium steel material, possess high hardness and good wear resistance 5105 Bending Angle: Bending angle is 105, used for electric drill screwdriver tools, flexible and practical