Super strong, super light, completely hidden trailer hitch Machined entirely out of Aircraft Aluminum Weighs only 8 lbs. Attaches to the main frame only Compatible with both ball type and Heim joint type couplers Strong enough to lift the 834.3 lb. GL1800, yet it does not restrict the ability to remove the rear tire. Key to its superior strength and rigidity is lightweight aircraft aluminum and proper basic design elements like perfect triangulation of the mounting points, not heavy masses of steel