Secure your bike rack to the hitch with the trusted Advantage Threaded Hitch Lock for 1-1/4 in. Receiver. It's an incredibly versatile lock capable fitting all 1-1/4-inch receivers (Class I, II, III, or IV). It features a threaded 1/2-inch diameter pin, a spare key, and a weather resistant anti-theft lock. Constructed of durable steel in the USA. This is just what you need to keep your bike rack or trailer perfectly safe. About Heininger Holdings LLC Founded in 1999, Heininger Holdings LLC specializes in making road travel more fun and convenient. All their products, which include truck hitches, cargo accessories, and much more, feature unique design that's guaranteed to enhance your traveling experience. They care so much about their consumers that they openly accept suggestions and new, revolutionary product ideas from customers via email. This is a company concerned with making the best product possible and backing it with the best service in the industry. And their care for the environment is second to none! Since 1999, Heininger Holdings LLC. has been using as much recycled paper as possible, working closely with suppliers to get you the highest quality eco-friendly product they can. Heininger Holdings is located in Bellingham, WA.