- High Quality construction: The main body is made of lightweight, high-strength aluminum alloy for reduced weight without compromising strength. It shows anti-drilling and anti-cutting protection, and the surface is coated for rust and corrosion resistance to endure harsh climates. - High visibility warning tag: The lock includes a warning label with a chain connection that makes the lock easy to notice and serves as a reminder to remove it before connecting to the trailer. It also acts as a deterrent to malicious tampering. - Enhanced security: A heavy-duty king pin lock that helps prevent unauthorized trailers from being coupled to the tractor. It features side key precision lock cores for convenient operation and includes two high-security snake keys to maximize security. Keep your keys safe and do not lose them. - Easy installation: Quick and easy to install. Engage the lock on the trailer hitch, insert the key into the lock cylinder, and rotate 180 degrees to secure the main pin lock in place. Note that each lock has its own key and different locks cannot share keys. - Practical scenarios: Protect parked trailers at yards or depots to deter theft. Use during overnight stops or at freight terminals to secure the king pin when the trailer is detached. Suitable for job sites or loading/unloading areas where trailer access control is important.