- 100% brand new and high quality

 - Interface has a locking mechanism,built-have magnetic,automatically pop up batch head

 - Extend all kinds of screwdriver bits,screwdriver head conversion uses.Fast

fastening,greatly improve work efficiency

 - For use in hand-held drivers or power drills, this 1/4 inch female by 1/4 inch male

magnetic bit holder

 - Very helpful to remove or tighten a large number of screws after you've started or

loosened them

 - Suitable for drill,screwdriver,batch head and other to transfer.has a hardened and

tempered steel shaft with a quick-release chuck

 Product Details

 - Material: Chrome Vanadium Steel

 - Color: Black

 - Length: Small:2.36", Medium:4", Large:6"

 - Hex shank: 6.35mm( 1/4" )

 - Fir for: 1/4" shank dirver bit