Challenger Lifts CL4P9CS Four Post Lift Caster SetChallenger Lifts CL4P9CS Four Post Lift Caster Set How cool is this? Just simply mount one of the caster assemblies onto each of the four columns after you have raised the lift's runways. It's easy to do. They mount quickly and easily with a pin. Then, just lower the runways down onto the casters and next thing you know, the weight transfers off of the base plates at the bottom of each column and onto the caster wheels. Now you're ready to roll. Just