The adjustable trailer hitch ball mount with dual ball from Curt is made from high-strength steel and built for durability, providing for longevity and dependable and safe towing. The adjustable ball provides flexibility and utility for differing applications and load weights, so that you can make changes on the go and be prepared for varying circumstances. The dual ball allows you to carry just one attachment and have two options for ball sizes and the adjustable shank allows for modifications in height, depending on the weight of the load as well as the height of your truck for quick and precise trailer leveling. The highly versatile design adapts to multiple vehicle trailer combinations to keep you prepared, providing for a rise of up to 4-1/2 in and a drop of up to 5-1/2 in and the dual ball attachment can be used on other Curt WD shanks. Built-in anti-rattle technology promotes a quiet and noise-free ride for a more comfortable towing experience for your family or work crew. The unique clip design installs easily over both pins, preventing the need for two separate pins and is vibration-resistant. Built from robust steel and finished with a durable carbide powder-coat finish with chrome-plated trailer balls, the hitch is corrosion-resistant and built to endure rigorous use. The forged 2 in ball is rated for 10,000 lb and the 2-5/16 in ball rated for 15,000 lb and comes with a limited lifetime warranty one year on the finish and one year on the parts.