The Hitch Tightener Anti-Rattle Stabilizer from Oxgord prevents unwanted movement, wobble, rattle and noises for hitch racks, bike racks, trailer ball mounts, cargo racks, spare tire mounts, trailers or pretty much anything else you’re towing or carrying in your hitch. Our anti-rattle hitch tightener works for class II and III, (2 and 3) hitches that measure either 1.25 or 2 inches. It’s incredibly easy to install, compatible with most hitch brands, and prevents rocking, banging, clanking, jerking, and movement behind your vehicle caused by a common hitch connection. Its sturdy and durable design features powder coated galvanized steel, which allows it to endure weather, rust, heavy loads, and general wear and tear. Though our hitch tightener is not a conversion tool, it can be used to solidify the connection made when using one. PLEASE NOTE: You will need a 3/4 deep socket or adjustable wrench to fully tighten the nuts when using the product. Re-tighten the nuts after every use to retain the strongest hold, a necessary evil to balance the tightest hold with an ability to still remove the hitch tightener. Each purchase includes one (1) U bolt, one (1) tightener plate, two (2) flat washers, two (2) lock washers, two (2) nuts, and a one (1) year limited warranty.