Kingpin locks can secure a trailer, but can also cause problems, including fifth wheel damage and muscle injuries to drivers. The Gear Down lock lets the driver work from the trailer side. Installed in seconds, it secures the landing gear crank handle in a heavy-gauge steel enclosure, padlocked in place with either a shackle-less lock or a shackle-type recommended for drop-and-hook. If the gear can't be cranked, the trailer can't be moved. Winfel Enterprises Inc. Call (877) 432-7369 for details and to order.