Compatible with most 17/8 in, 2 in, and 25/16 in trailer couplers. Suitable for cars and trailers, regular trailers, mobile trucks, boat trailers, covered utility trailers, bulldog trailers, jet ski trailers, travel trailers, and camping trailers, etc. trailer hitch lock. The lock is built with a aluminum body and a hardened diecast zinc lock core to provide strong protection for your trailer. The total lock body is painted to resist rust and withstand any weather conditions. Security and antitheft. The trailer locking core controls the coupler to prevent others from pulling out the receiver/coupler, helping to protect your trailer from being moved by other vehicles. The locking mechanism resists picking and prying. The exterior is finished in a bright yellow paint for visibility, acting as a deterrent to thieves and increasing security. Key benefits at a glance Wide compatibility: fits almost all common couplers (17/8 in, 2 in, and 25/16 in). Durable construction: aluminum body with a hardened zinc lock core; rustresistant and weatherproof finish. Enhanced security: prevents accidental or intentional detachment; resistant to picking and prying. Visible deterrence: striking yellow exterior to discourage theft. Specifications and performance Compatibility: 17/8 in, 2 in, and 25/16 in trailer couplers Material: aluminum body; hardened diecast zinc lock core Finish: rustresistant paint designed for allweather use Purpose: trailer locking to secure the coupler and prevent unauthorized removal Usage scenarios Overnight campground or boat launch: secure the trailer to the hitch when you are away from the vehicle, reducing the risk of theft. Mobile work sites or temporary storage: leave the trailer parked securely with the lock in place to prevent tampering or unauthorized movement. Watercraft or toy trailers: protect jet ski, boat, or other recreational trailers when parked at marinas, ramps, or public lots. This description preserves the original product's compatibility, materials, functions, and security features while presenting them in clear, concise language for easy reading and strong conversion.