1-1/4in Receiver Lock - This double headed or dog bone style receiver lock features a triple plated chrome 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. Width between heads (exposed pin length or gap space) is 2-3/4 inch. The 1/2 inch pin fits all Class II receiver hitches. Lifetime Warranty.