Sales rep mentioned the 751 key to me at time of purchase. Changed all of my locks to a different series, so it will stop most keys. However I have seen were dealership have a master 700 key that opens all. If you are interested Rv Locks and More sells the cam part of the lock and keys fairly cheap if you want to get away from the 751 series. Locks typically keep honest folks honest, nothing short of a guard dog and or a firearm will stop a thief.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 101 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 68, 3 more planned