The CURT universal trailer coupler lock offers full compatibility with trailers equipped with 1-7/8", 2" or 2-5/16" couplers. Its ratchet-style mechanism allows for easy, effortless trailer coupler security. Just insert the lock base into the coupler and slide the U-bar over the coupler's nose, engaging the lock. Unlocking is a breeze – a simple quarter turn of the key frees the lock. The ratcheting U-lock combats theft and ensures extended security by immobilizing the lock base within the coupler, thwarting any attempt at removal. Its bright orange powder coat finish deters thieves and enhances visibility, allowing you easily spot tampering or interference from a distance. The U-lock, lock base and ratcheting mechanism are made to be corrosion-resistant, ensuring long-lasting durability and prolonged security. The thick and durable bright orange powder coat finish protects against sun, water and weather, effectively deterring theft, while maintaining visibility and safeguarding against dings and scratches.