Brass Coupler LockMakes your trailer virtually theft-proof, whether it&';s on or off the car. Brass coupler lock prevents theft and accidental uncoupling. Brass Solid cast and heat treated for toughness Corrosion resistant Fits standard trailer coupler lock levers 1/4" lock pin 3/4" wide opening Comes with 2 keysWARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.