RETRUE Universal Trailer Hitch Coupler Lock, Grey & Silver — Heavy-Duty Adjustable Weatherproof Security

RETRUE Universal Trailer Hitch Coupler Lock is a heavy-duty, adjustable coupler lock that secures 1-7/8", 2", and 2-5/16" trailer balls with reinforced steel construction and a tamper-resistant cylinder.

When you park a trailer, theft prevention starts at the coupler; this RETRUE lock clamps over the trailer ball and resists cutting, prying, and weather damage. Built from an aluminum body and A36 high-strength steel with an upgraded lock cylinder and thicker keys, it’s engineered for long-term outdoor use. The lock’s adjustable design accommodates the most common coupler sizes, making it a practical universal solution for utility, boat, camper, and cargo trailers.

How does the adjustable design fit different coupler sizes?

The RETRUE coupler lock includes 11 locking positions so you can fine-tune the fit around 1-7/8", 2", and 2-5/16" trailer balls. This range eliminates the need to buy multiple locks for different trailers. Adjusting is straightforward and secures the lock tightly to minimize rattle or movement while stationary.

• 11 locking positions for precise fit
• Works with the three most common ball diameters
• Simple adjustment procedure—no special tools required
• Designed to reduce vibration and looseness when installed

What makes this lock resistant to cutting and forced entry?

RETRUE combines a thicker, wider U-shaped steel pipe with an aluminum lock body to offer robust resistance against saws and leverage attacks. The internal components use A36 high-strength steel for shear and cut resistance. Additionally, the upgraded, more complex lock cylinder and thicker keys raise the difficulty for picking or forced entry.

• Wider, thicker U-shaped steel pipe for increased bite resistance
• Aluminum housing with A36 steel internal components
• Complex cylinder design and durable keys to deter picking
• Weatherproof finish to prevent corrosion that could compromise strength

How does this lock perform outdoors and over time?

This model is rustproof and weatherproof, designed for regular exposure to rain, salt air, and temperature swings. Protective finishes and corrosion-resistant materials help ensure smooth key action and mechanical reliability. Routine cleaning and occasional lubrication will keep the cylinder operating over years of use.

• Corrosion-resistant materials and weatherproof coating
• Upgraded keys minimize wear from repeated use
• Recommended occasional lubrication for long-term smooth operation
• Designed to hold up in coastal, winter, and general outdoor environments

What support and warranty come with the RETRUE coupler lock?

RETRUE backs this product with a 120-day warranty and responsive customer service available around the clock. If you encounter fitment or function problems, reach out through the seller’s "Ask a Question" option for prompt assistance. The warranty and support demonstrate a commitment to product quality and customer satisfaction.

• 120-day warranty for manufacturing or fit issues
• 24/7 customer support via the product Q&A channel
• Clear replacement or assistance process if problems arise
• Quality control checks performed prior to shipment

Who is this for: The RETRUE Universal Trailer Hitch Coupler Lock is ideal for trailer owners who want a single, rugged locking solution for multiple couplers—owners of boat trailers, utility trailers, campers, and cargo haulers who need a weatherproof, theft-resistant lock that fits common ball sizes. It also suits fleet managers and rental companies that require durable, interchangeable security across mixed trailers.