5/8 inch Black Premium Key Receiver Lock Rugged - This double headed or dog bone style receiver lock features a Black epoxy powder coated finish along with hardened steel to provide instant security for your camper, boat or trailer by securing your vehicle receiver hitch. It features patented 1/4 turn techology that cannot be false locked and comes with a protective rubber cap along with an O-ring to keep out water, grime and dirt. Includes two 7 pin, high security keys. Patented dual lock lug design offers over 5,800 lbs of head pull strength. The 5/8 inch pin fits all Class III, IV and V receiver hitches. Width between heads (exposed pin length or gap space) is 2 3/4 inch. Lifetime Warranty.