1/4″ Adjustable Class II Coupler Lock Sorry, this product cannot be purchased. SKU: 1636 Categories: Locks, Locks & Pins Related products 3/8″ X 1 1/2″ Square Pin Call For Price Part #:1236 Trimax Universal Coupler Lock Call For Price Part #:1631 Receiver Lock T5 Fits 2 1/2″ & 3″ Recivers Call For Price Part #:1635 5/8″ x 4″ Hitch Pin Call For Price Part #:1255