Retriever mounts on back of 1 1/2 or 2 ton truck. It will pick up hay that has been stacked with a bale wagon for transport to another location. It will handle 55-106 2 wide stack or 33-160 three wide stack. It is used to pick up after a balewagon and take to the storage yard or barn. If the distance is quite a ways this allows the bale wagon to continue picking up hay. For distances of 2 or 3 miles or more it is much faster than a balewagon. It is also a better way to deliver hay which has been sold. It takes 17 1/2 feet roof clearance in the barn, therefore pull type bale wagons may need more roof height than they are used to.