I purchased a set of Tork Lift fastgun locks when I was buying everything else for our setup. The fastguns are great, not as fond of the locks. They take two hands to lock/unlock and they add another key to the key ring. After changing my compartment locks to match my entry door key, I ditched the fastgun locks in favor of longer shackle master padlocks. You can order most any size lock and shackle length from McMaster Carr that are keyed alike. I have just three keys now for everything. About ten padlocks, the camper key and the truck key. Also, on my GMC the fuel door is partially blocked by the fastgun. I can open the padlock with one hand while swiping my CC or opening the fuel door, removing the cap, etc. with the other hand, which is not possible with the Tork Lift locks.