The 6,500 lb Deluxe Gear Plate Assembly features a solid aluminum worm housing, extended support blocks, easy to reach grease fittings, and composite bronze backplate bearing. There are no steel on steel moving parts. The Plate Assembly has a single worm with a hardened steel worm and solid 96 tooth worm gear. Rated for 6,500 lb capacity. Galvanized gear plate assembly only.