General description The Trailer Tongue Coupler Lock is designed for a secure fit on latch type couplers, making it ideal for towing boats, trucks, RVs, and car trailers. This locking coupler provides enhanced security and is built to withstand various weather conditions. Technical specifications Diameter: 5/8 inch Material: High-strength steel with black electrophoretic paint Locking mechanism: Zinc alloy tubular cylinder with a stronger round key Usage Locking coupler for RVs and tow trucks Designed to keep the trailer secure during towing Easy to lock and unlock with a key Comes with 2 keys per set for added convenience Other information Waterproof rubber cap protects against rain, snow, ice, and dirt Handles all kinds of weather conditions Once locked, pull the lock to ensure it is secure