Make your tow vehicle and trailer more secure by keeping them locked up tight with a CURT hitch and coupler lock set This twopiece set includes a hitch lock and universal coupler lock so whether you are towing or storing you can keep your trailer more secure Like a hitch pin and clip the hitch lock is designed to insert into the hole in the side of a receiver tube to hold a ball mount or hitchmounted accessory in place It features a pin diameter of 58 to fit 2 or 212 receiver tube openings Likewise CURT coupler locks are designed to add security to your trailer and towing equipment Instead of merely retaining the coupler latch mechanism they lock it into place and act as a theft deterrent for your trailer while it is coupled to your vehicle This coupler lock features a pin diameter of 14 and fits any coupler span from 12 to 212 This set of two locks also includes a universal trailer coupler lock The universal triball trailer coupler lock is engineered to be the ultimate in trailer towing security It is highly theftresistant and tamperresistant featuring builtin safety measures to keep your trailer safe It offers security whether your trailer is hitched up to your vehicle or left parked and unattended This unique coupler lock has a lasso lanyard that is keyoperated It allows the trailer lock to be used while towing a trailer keeping the latch locked in place It can also be used in tandem with the triple ball mount to fully secure the coupler when the trailer is parked The triball is constructed from highstrength glassfilled polymer This blend of materials is exceptionally durable and the orange color increases visibility to further deter tampering The triball lock fits all three industrystandard coupler and ball sizes 178 2 and 2516 For the ultimate in towing security and convenience both locks in this lock set are keyed alike