One of my 2 CH751 keys broke over the July 4th weekend. I ordered Combi-Cam 7850R-L-Black Large 1-1/8" Combinated Cam Lock for the compartments and they fit perfectly. Now I can stop worrying about how the key is bending or warping. It's only a 3 digit lock but I think the level of security is not diminished from the cheap locks I replaced. I have a 2005 Fleetwood Tioga 31M.