Secure your trailer to the hitch, or lock up your valuables using this latch lock. Hardened 1/4-chrome-plated steel shackle offers maximum security; and fits most existing coupler designs. Key fits couplers with up to 3/4 span. Weatherproof cap seals out grime and protects from corrosion. Protective rubber bumper prevents noisy rattling. Easy 1/4-turn of key locks and unlocks. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Coupler Lock.