ASEplatinum RJ-45 Rolling Jack 4,500 lbs. CapacityASEplatinum RJ 45 Rolling Jack 4,500 lbs. Capacity The RJ 45 Rolling Jack is a scissor style rolling bridge jack designed to be mounted in a four post lift's jack rails. Manual pump operation requires no air making for a clean, uncluttered work environment for the professional shop and the car enthusiast. The scissor style jack allows for level, wheels free lifting to expand your four post lift's capabilities.