ONLY STINGER GIVES YOU THE FREEDOM TO ROLL YOUR CASTERS TO THEIR RESPECTIVE POST FOR MOUNTING. THIS OPTIONAL CASTER KIT GIVES YOU COMPLETE MOBILITY IN MOVING YOUR LIFT TO ITS DESIRED LOCATION. THIS ONE OF A KIND DESIGN ELIMINATES THE USE OF PEGS WELDED ON THE BOTTOM OF THE POST WHICH CAN BE HARD ON THE ANKLES, IT ALSO ELIMINATES THE RISK OF THE HYDRAULIC HOSE BEING TORN AWAY AS IT WARPS ITSELF AROUND THESE ANNOYING PEGS. OUR CASTER SET IS SIMPLE, SAFE  AND EFFECTIVE.