1. To secure the lock, simply pull the ball of the hook through the shackle and then tighten the lock. This allows you to park trailers and carts on public roads without fear of theft. 2. Our trailer lock provides protection when it comes to securing your trailer, caravan, or camper against theft. 3. Thanks to the ball head, the lock is compatible with all standard trailer hitches with a 50mm receiver. 4. The lock is made of solid steel, making it particularly sturdy and resistant to forceful impacts such as drilling, prying, or sawing. Additionally, the coating offers resistance to rust, corrosion, and other weather conditions. 5. Thanks to the builtin cross lock, the cylinder lock is much harder to force open than simple locks, further enhancing theft protection. Two keys for the security cross lock are included in the package.