Today, we're going to review part number AT89002. This is the Atwood AMPLock King Pin Lock. This will wrap around the king pin on your 5th wheel trailer to help prevent tow away theft. It is a very heavy, about 5 pound cast iron base, which will resist freezing, shattering, and burning. It has a nice black powder coat finish to help resist corrosion. The disc tumbler right in here, the lock part… see more >