Blue Ox makes two styles: the Removable type and Standard type.

Demco makes two styles: the Removable type and Standard type.

Roadmaster makes six styles of baseplates: XL, Classic, MS, MX, EZ-5, EZ-4 and EZ Style Baseplates

When buying a Roadmaster Baseplate, adaptor bars are required. That item only comes with their tow bars