A base plate kit is the hardware that gets bolted to the front of a vehicle which is what provides the attachment point for a tow bar when flat towing. I attached a link to this page that is a help article that covers what base plate kits are as well for you to check out.
The difference between the # RM-4700 and the # RM-4750 is being able to use them with your base plates. If you have the crossbar on your base plates you will need part # RM-4700.
The RM-4750 is not compatible with... view full answer...