The RJ9W includes a pneumatic-hydraulic power unit attached to the jack, with no hydraulic sharing between the car lift and bridge jack. The air line connects directly to the bridge jack and requires 125 psi and 10 to 20 CFM, while foot-pedal control gives the operator convenient command over raising the jack. Three lock positions help users select the service height that feels right for the vehicle, the task, and the operator. Raise the four-post lift, set the bridge jack height, and get the clearance needed for wheel, brake, suspension, and undercarriage work on heavier vehicles.