Just screw down the included setscrew into the body mount, place the O-Ring over the setscrew and mount your body as you normally would, but with the added safety, security, and styling of Pro-Line's innovative screw on body mounting system! This body mount system opens new body options, like tall SUV-style bodies, that you didn't have before due to the tall posts included with this system. If you have a Tenacity™ SCT or TT Pro, then this is a must-have upgrade. Get your own Extended Body Mount Kit today!