The Rightline Gear Anti-Theft Trailer Coupler Ball guards against theft while your trailer is detached from your vehicle. Thanks to this innovative trailer tongue lock, you can leave your trailer without having to worry about whether it will be there when you get back. The included Trailer Ball guards against trailer tow-away by filling the space where hitch balls or smaller towing devices are normally inserted. The polycarbonate trailer ball lock cannot be broken or removed once it is secured in place by the trailer coupler lock. An orange band around the lock alerts potential thieves that you are protected, even before they approach the trailer. A handy UV-protected zip tie secures the Trailer Ball to the trailer chain, meaning the Trailer Ball is nearly impossible to misplace. No more looking under your seats or searching throughout your trunk to find your security device. Our anti-theft locking devices, including our Anti-Theft Trailer Coupler Ball, perform better than many trailer security devices that are double or triple the cost.