[Higher Security and Theft Deterrence] The keyed alike trailer receiver lock is made with high-strength steel. So that the trailer hitch pin lock can ensure locking safe and protect your trailer and trailer hitch ball mount from theft. | [Compatible with Most Hitches] With a 5/8-inch diameter hitch pin and 2-3/4 inches of effective pin length, our trailer hitch receiver lock fits 2-inch any receiver tubes, and it is suitable for Class III & IV hitches. | [Durable and Watertight] The all-weather cover cap of our trailer hitch lock keeps the keyhole away from water and dust. The dustproof and waterproof lock pin is more durable. | [Stronger Copper Keys] This trailer hitch lock come with two keys. The keys made of copper and covered non-slip protective, fit our upgraded zinc alloy lock core, which is more solid and stronger than ordinary keys. | [Prevent Rattling Noise] When you are using a trailer hitch, you might run into some issues like rattling and noise. Our trailer hitch lock pin is equipped with 4 rubber O-rings, which can effectively prevent rattling noise caused by shaking during towing. | [NOTE] If you want to buy 2 sets or more of this product, please NOTE: the keys of different sets are NOT KEYED ALIKE. For special needs(2 or more sets keyed alike), please contact us before purchase!