The LOCK-DOWN Hitch Tightener Heavy Duty No-Wobble Hitch Stabilizer for 1.25" and 2" Receivers- Made in USA, Rust Proof, Quick Install, Stops Trailer Hitch Rattling! The LOCK-DOWN Hitch Tightener was designed to completely eliminate hitch noise, wobble, clanking, rattle, and jerking for tow hitches, bike racks, hitch racks, trailers, carriers, etc Works on both 2" and 1.25" tow hitch receivers class I, II, III, or IV (1 2 3 or 4). Does not fit 2.5" receivers. Industrial grade zinc coated hardware and powder coated plate is corrosion resistant and will not rust. Works with almost all styles hitches, hitch platforms, motorcycle racks, hitch carriers, boxes, luggage racks or platforms. Perfect for many styles of tow vehicles including cars, trucks, vans, campers, RV's, SUV's, and minivans. Compatible with most hitch manufacturers Includes a powder coated stiffener plate and all yellow zinc-coated hardware necessary for installation (Industrial Grade U-bolt, two nuts, two split lock washers, and two flat washers) Made In USA and comes with LIFETIME warranty