Welcome to iRV2 .
Before you buy anything , do you have a vehicle you're thinking of towing ?
Is it 4 down tow able ?
If you go to this site and enter the vehicle info , you can get info on what you'll need if it is .
Store : Remco
Then if you want to buy the used items visit the Demco site to see if they sell a " base plate " to attach the bars to your vehicle . The bars are only part of the hook up.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.