The mill has a bed on which the drive is located with interchangeable plates. Both the operator-side and the driver-side stands are typical operator-side type stands, complete with shafts and tooling.
The drive-side stands usually have larger bearing blocks to accommodate pairs of cone bearings, which rigidly hold the shafts in position during the operation. The operator-side stand is removed for occasional roll change. This allows quick plate (profile) change.