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! 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 2405 Wilcox Drive Norman, OK  73069 Phone: 405.360.4800 or Cell: 405.249.6162 Fax: 405.321.5381 Home Page