This bundle contains two items, 1x Master Lock 379ATPY Universal Trailer Hitch Lock and 1x Master Lock 2866DAT Receiver Lock: The Master Lock 379ATPY features a universal trailer coupler lock, designed to fit 1-7/8 in. (48 mm), 2 in. (51 mm) and most 2-5/16 in. (59 mm) couplers. The advanced locking mechanism provides resistance to picking and prying. The Master Lock 2866DAT features 1/2 in. (13 mm) and 5/8 in. (16 mm) Swivel Head receiver locks. The receiver lock includes the Push to Lock locking mechanism, easily used by pushing the lock body firmly onto the pin and removing the key. The Weather Tough seal and water tight cap provides additional protection from moisture and dirt. Includes a 4-pin cylinder for added pick resistance. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust. Trailer hitch lock fits 1-7/8 in. (48mm), 2 in. (51mm) and most 2-5/16 in. (59mm) trailer couplers Trailer lock is best used for vehicles, trailers, and RVs Trailer coupler lock features advanced locking mechanism to resist picking and prying Trailer hitch lock is constructed from zinc to resist rust and corrosion Receiver lock provides added security and theft deterrence while towing