TowSmart Class I/II III/IV Barrel Trailer Receiver Lock is a versatile barrel-style receiver lock designed for use with class I/II or III/IV receivers. This lock features a sleeved barrel that fits both 5/8" and 1/2" receiver pin holes, ensuring compatibility with a range of trailer hitch setups. The push-button lock mechanism ease of use, while the rubber cap helps keep dirt and debris out, maintaining smooth operation. Made from chrome-plated material, this lock combines durability with a sleek finish. Packaged individually with a hang tag, it includes a tubular key design for secure locking. Model Number: 7005600