Demco's baseplates are designed specifically to respect the beauty and design of your vehicle. Demco's engineers use Finite Elemental Analysis (FEA) when testing our baseplates for strength, functionality, and durability. On most vehicles, they won't protrude out, hang below or rise above your bumper or grill. Bolts permanently to the chassis of the towed vehicle and provides a secure, reliable attachment point for all Demco tow bars. The *4 represent baseplates that are concealed through the bumper opening. The *9 represents baseplates that are adaptable to Blue Ox tow bars with a 3-prong clevis. Demco's 9518134 Classic Baseplate is compatible with 2002 to 2005 Dodge Ram 1500 Series Pickups with two and four wheel drive (includes Sport) and 2003 to 2018 Dodge Ram 2500 and 3500 Series Pickups with two and four wheel drive (includes Mega Cab and Diesel).