Description:Trailer hitch lock can prevent the trailer from being stolen by keeping the vehicle and trailer connected. This ball lock is made of premium zinc-alloy material, fitting for all popular trailer couplings. If you have any concerns about this hitch lock, please feel free to contact us.Specification:Color: SilverShank Length: 68mmOverall length: 149mmOverall diameter: 30mmShank diameter: 5/8 (16mm)Material:steel,chrome plated surfacePackage included:1x Trailer Hitch Lock1x 6mm hex adjustment key2x nickel-plated brass keys