Stainless steel keyed alike receiver lock and coupler latch lock. 5/8″ receiver lock has Push to Lock locking mechanism – push lock body onto pin firmly and remove key. Usable length of receiver pin is 2-3/4″. Weather Tough seal and water tight cap protects lock from moisture and dirt. Adjustable coupler latch lock; locks from 9/16″ to 2-3/4″. K1 Key Blank. Limited Lifetime Warranty.