ENHANCED SECURITY: Offers superior protection, preventing tampering with the coupler. This all-in-one locking solution simplifies your trailer security needs. PERFECT FIT: Custom designed for 2" and 2-5/16" RAM and Bulldog type slip collar couplers, perfect for equipment, flatbed, and livestock trailers. ROBUST CONSTRUCTION: Built with 1/4" and 3/16" heavy-duty structural steel, this lock is bolt cutter-proof and weather-resistant for lasting durability and reliability. EASY INSTALLATION: Features a standard Trimax Puck Lock, shrouded in steel for added protection. Quick and easy installation, securing your trailer in seconds. MADE IN THE USA: Proudly designed and manufactured in the USA, meeting high-quality standards for optimal performance and reliability. Protect your trailer with the S5 Coupler Lock LCS001, designed specifically for use with RAM and Bulldog 2" and 2-5/16" couplers. This versatile, heavy-duty coupler lock is engineered to fit both coupler sizes securely, providing enhanced anti-theft protection for your trailer. Built for convenience, this lock has been precision-fitted for Ram and Bulldog couplers, so you can rest assured it will be a perfect fit for your needs. For 2" couplers, the lock is designed to fit while the coupler remains in the open position. For 2-5/16" couplers, simply secure it with the coupler in the closed position. A heavy-duty puck lock is included with your purchase, delivering premium security and peace of mind, so you can leave your trailer knowing it’s safe.