Yes. If you have a class I or class II receiver, the best size is a 1 ¼ inch lock. If you have a class III or larger receiver, go for a 2-inch lock. Make sure the interior width of your receiver is similar or slightly more than the overall width measurement of the hitch at the hitch pinhole. If you are not sure, consult with the person selling you the coupler lock. They may help you get the right lock and even show you how to use it.