Trailer Coupler Safety Lock – Anti-Theft Hitch Device (20 x 20 mm)

Keep your trailer safe from theft with this robust trailer coupler safety lock. Engineered for boat and utility trailers, this lock installs directly onto the trailer’s coupler (the “tongue” or hitch head). Once locked in place, it blocks the coupler mechanism so that a vehicle’s hitch ball cannot be inserted and the coupler cannot be opened or removed without the proper key. This effectively immobilizes the trailer, preventing thieves from easily hitching it up and driving away with your boat.

The lock is made of hardened steel or high-strength alloy with a protective coating to resist rust and weather. The design is compatible with a wide range of coupler types – the 20 x 20 mm specification refers to the locking bar or element, which is sized to fit standard couplers, including the specified EVAL models. The included key is a high-security “секретен” key with a unique code, making it extremely difficult to pick or duplicate, thereby enhancing theft protection. Using the device is straightforward: when the trailer is unhitched, place the lock over/into the coupler and turn the key to secure it – your trailer is now guarded against unauthorized hookup.

Use Cases and Recommendations:

• Highly recommended for all boat trailer owners – from small jet-ski trailers to large dual-axle boat haulers – especially when the trailer is kept in an area without constant supervision (marina lots, driveways, campgrounds).
• Use the lock whenever the trailer is not attached to a tow vehicle: for example, when your boat is stored for the season, parked at the marina, or even during short stops on the road. This will effectively deter quick theft attempts.
• The lock is designed to fit specific EVAL trailer couplers (e.g., codes 01497-60, 01497-70, 01498-50, 01498-60, 01499, 01500, etc.), but it also works with most standard 50 mm hitch systems which are commonly used on trailers.
• When not in use, keep the lock handy – its compact size allows it to be stored in your vehicle’s glove box, trunk, or gear bag. That way, you can secure your trailer at any time you disconnect it.
• For even greater security, consider pairing this coupler lock with an additional wheel lock (boot) on the trailer. However, often the coupler lock alone is enough to make thieves skip your trailer in search of an easier target, since it significantly complicates towing it away.

In summary, this trailer coupler safety lock is a simple yet highly effective tool to protect your trailer and boat from theft. It installs in seconds, is built to withstand harsh outdoor conditions, and serves as a visible warning that the trailer is securely locked. This gives you peace of mind whenever you have to leave your boat trailer unattended.