VEVOR Collar Coupler Lock for 2 & 2-5/16-Inch Demco Cast Head Couplers – Anti-Theft Trailer Lock with 3 Keys

Strong protection for your trailer gear

When you park your RV, trailer, or boat, security is a practical concern. The VEVOR Collar Coupler Lock is designed to work with two common Demco cast head coupler sizes and is built to stand up to real-world use. The lock has a substantial feel in the hand, and its finish hints at durability even before you test it in varied weather. The combination of robust materials and thoughtful design offers a reliable layer of protection without creating extra steps in your routine. This is a product that positions security as a practical possibility, not a promise, so you can assess its fit for your setup with clear expectations.

Compatibility and core design

The lock fits two coupler sizes—2-inch (50.6 mm) and 2-5/16-inch (58.6 mm) Demco cast head couplers—making it versatile for a range of trailers. Before you buy, confirm your coupler size to ensure a proper fit. Weighing about 11.46 pounds, the unit communicates a sturdy construction that can stay in place through routine handling and transport. The 0.2-inch wall thickness contributes to its solid profile while remaining manageable for regular use.

Key benefits you may notice

• Compatibility with 2-inch and 2-5/16-inch Demco cast head couplers for flexible use.
• Heavy-duty anti-theft design in carbon steel with a thick wall to resist prying attempts.
• Quick and easy locking in under 30 seconds, with a cushion pad that helps keep the fit snug.
• Rust-resistant powder coating and an aluminum alloy lock body for smoother operation in varying weather.
• Dust-cap protection keeps moisture away, helping extend the life of the lock.
• Three keys included for convenient access and backup across multiple users or vehicles.

Where and how you might use it

• At campgrounds or marinas where a parked trailer deserves extra deterrence from opportunistic theft.
• During long road trips or seasonal storage when you are away from the trailer for extended periods.
• For versatile security on most travel trailers, motorhomes, and boats that rely on Demco couplers.

Simple and reliable to install

Locking is designed to be quick and intuitive. You can unlock, place the collar on the coupler, and secure in under 30 seconds. An internal cushion pad ensures a stable, snug fit that stays in place even during movement or loading operations. The one-hand friendly design reduces fuss when you are managing gear or departing for the next stop.

Durability and weather readiness

The lock body uses aluminum for smooth operation, and the powder coating provides corrosion resistance in damp or salty environments. A dust cap shields the mechanism from moisture, helping extend the life of the lock through changing seasons. This combination supports ongoing performance without requiring frequent attention or maintenance.