Our Big Red Lock Story Why Big Red Lock? Photo Views of Big Red Lock Order Big Red Lock Today Email Big Red LOCK Company If you have a trailer with a 2 or 2 5/16 inch Bulldog hitch you need Big Red LOCK! Our lock fits the Bulldog brand hitches.   See hitch photos here. If you have a different hitch brand than the Bulldog and want to know if our lock will fit your hitch, please call us before ordering. Big Red LOCK is on a trailer tongue securing the chains and hitch. lock (trailer end) next Email: info@bigredlock.com Contact: Ken Marley Big Red Lock Ken Marley 4000 Cemetery Road, Lot #30 Noble, OK  73068 Phone:  405.740.4264 Home Page