Designed for hood and trunk applications, these stainless steel mounts go on the inside channel of your hood or trunk. There are no visible mounting holes required. All mounting hardware (also stainless steel) is hidden inside the hood or trunk channel. Either mount comes complete with antenna mounting stud. Many of the newer Ford and Chevy pick-ups have a deep channel for the hood. This mount is ideal for those vehicles. Of course, this mount isn't limited to pick-ups. It can be used on just about any vehicle with a hood and/or trunk. The bracket measures 2.9" (74cm) from the mounting base to the top of the bracket itself. The height from the mounting base to the first bend is 2.1" (53mm) so it can be used on channels with depths up to 2" (51mm). This mount may be used with heavy-duty fiberglass antennas up to 48" (122cm)