Reese Towpower Universal Coupler Lock - Trailer coupler locks universal Ratchet design with 6 locking positions, fits 1- 7/8 inches, 2 inches and 2- 5/16 inches couplers. Advanced locking mechanism resists picking and pryingGuards against trailer theft while your trailer is unhitched from vehicleHeavy duty cast steel constructionRatch design with six locking positions works with a range of couplerWeather resistant zinc finish resists rust