The VIM Tools Dual Swivel Locking Extension features a locking mechanism on the male end to hold the socket securely. The extension is ideal for accessing fasteners in hard-to-reach areas. It has a knurled center shaft for grip and maneuverability. The tool is also available in 1/4” Drive 6” OAL, No. DSE46, and 1/2” Drive 12” OAL, No. DSE812.