Wesco mini winch stackers feature two swivel casters and rigid wheels made of nylon / polyurethane for improved manoeuverability, low co-efficient of friction and excellent load bearing capacity. Ideal for narrow aisles, these steel stackers are integrated with lever-actuated wheel locks for preventing the bolt from moving or turning in the lock. They further come equipped with comfortable rubber hand grips and are available in 2 to 4 inch roller diameter variants on Raptor Supplies.