Dollies for unit load device (ULD) and cargo pallets are standard sized flatbed trolley or platform, with many wheels, roller bars or ball bearings protruding above the top surface for easy loading and unloading of ULD and cargo pallets respectively. Since ULD/pallet rest on ball bearings, these dollies are equipped with hinge/locks to secure the position of the ULD/pallet on them during tugging transportation. The aviation industry adopted ULD/pallets to be lightweight containers and supporting platforms respectively, intended to be loaded into aircraft and fly along with their loads, they need to be minimum in weight and thus do not have wheels or strong base structure.