The grabber is then used to pick-up hay bales packages lefted on the ground and to deposit them in the wagon. It can move laterally of 20 inches (side shift). It must be used with a 80 HP tractor with a front-end loader. It Requires 2 double action hydraulic outlet on loader. One for the hook and the other one for the side shift. You can load or unload in the warehouse from 800 to 1200 balls per hour.