The combination clamping bar offers 3 ways to clamp/support the workpiece: Floating mode Floating mode is used to clamp and support additional clamping points on components. Centric mode The jaws of the clamping bar move in sync. The centre axis of the workpiece remains unchanged even if the outer diameters are modified. Machine vice mode When this mode is selected, one of the jaws is locked in place on the clamping bar. The second jaw remains movable.