Trimax Locks UMAX100 Universal Trailer Lock

One size fits all. Fits coupler sizes 1-7/8", 2", to 2-5/16". Easy to install: Slide ball up into coupler and replace U-shackle. Has a huge 5/8" hardened steel shackle. The attractive ballistic grade nylon housing absorbs hammer blows and protects against weather. A key hole cover slides up to seal out dirt.