Trailer Defender™ Adjustable High Security Coupler Lock

Protect Your Investment with our proprietary High Security Coupler Lock. With 1/4″ steel housing, secured safety chains and backed by our $500 guarantee, this lock is the perfect defense toward trailer theft.

• BUILT LIKE A TANK: Made from 1/4″ thick industrial-grade steel, this lock is designed to withstand harsh weather and physical force. Whether faced with cutting tools, crowbars, or tough outdoor conditions, our trailer lock stands up to the challenge and provides long-lasting protection for your trailer.
• 360° TAMPER-PROOF DESIGN: The lock’s tamper-proof design ensures that it is resistant to attacks from any angle. Whether it’s cutting tools, crowbars, or other forced-entry attempts, our lock stands up to the test, providing round-the-clock security for your trailer.
• SECURES SAFETY CHAINS: Designed with convenience in mind, this lock not only secures your trailer but also locks down your safety chains. Prevent thieves from hooking up your trailer by safeguarding both the coupler and safety chains in one go.
• PREVENTS DRIVE-AWAY THEFT: Once installed, thieves won’t be able to hitch up your trailer and drive off. This lock creates a highly secure barrier between your trailer and would-be criminals, keeping your trailer exactly where you left it.
• EASY TO INSTALL & REMOVE: Installing this trailer lock is quick and hassle-free, allowing you to secure your trailer in minutes. When you’re ready to go, simply unlock and remove it, making it perfect for both long-term parking and daily use.
• PROUDLY MADE IN THE USA: We take pride in designing and manufacturing our locks right here in the USA. Our rigorous production standards ensure that every lock is crafted with precision and built to last, offering you unparalleled security and peace of mind.
• BACKED BY OUR $500 GUARANTEE. If your trailer is stolen by defeating the Interstate High Security Coupler Lock (and you can show us the defeated lock), we will give you a $500 credit toward the purchase of a replacement trailer from us.

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