Brass Coupler LockMakes your trailer virtually theft-proof, whether it's on or off the car. Brass coupler lock prevents theft and accidental uncoupling.BrassSolid cast and heat treated for toughnessCorrosion resistantFits standard trailer coupler lock levers1/4" lock pin3/4" wide openingComes 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.