Challenger Lifts RJ15 Rolling JackChallenger Lifts RJ15 Rolling Jack Nothing quite improves the functionality of a 4 post like rolling jacks. Eliminate the need to use manual and awkward bottle jacks and install a pair of rolling jacks add an airline kits for a complete solution. These jacks roll easily along the accessory rail, and include extendable widths and adapters to ensure you are able to reach vehicle pick up points.