Teng Tools 1/2" Extension BarThe 1 2" Extension Bar provides extra reach for sockets, allowing access to fasteners in recessed or hard to reach areas. It features a retention groove to secure the connection to the drive end and a ball detent on the male end for a reliable grip on the socket. Designed and manufactured to DIN3123B standards, it comes with a metal socket clip for convenient storage on a socket rail. Key features: Retention groove for secure attachment to the drive