Incorporates a Universal Leveling Head that Locks into 4 Different Positions. New Arm Design increases Vertical Travel and Rigidity. Hardened Stainless Steel Bushing. Compact and Lightweight for Travel and Storage. Improved Arm System allows for up to 4 full Lifts on one charge. Universal Stop Valve Allows Feathered Stops, as well as, Precise, Repetitive Moves. Universal Stop Valve Allows Settings on Upper and Lower Stops. New Control Valve Design is Faster and Quieter While Allowing Smooth Stops. New Wheel Composition Allows increased Rigidity, as well as, Silent Operation on Track. New Wheel Composition Allows Easier Steering and Maneuverability. Special Off Road Wheel additional accessory for transport over rough terrain. Works on Both Straight and Curved 24 1/2� Tubular Track or 880 mm Track.