This facom sliding t bar has a 12 inch drive to fit 12 inch sockets or extensions the t bar slides and has a friction head which allows the bar to be used as a t or l handle grooves at either end of the bar prevent it from sliding out the drive the long bar enables more leverage and easy two handed use thus making tightening and loosening fastenings easier the fcms120a sliding t handle is 275mm long performance conforms to iso 3315 din 3122 nf iso 3315