Review on K40 K40MM 3-Way Mirror Mount Double Groove CB Antenna - Chrome Plated, 60mm by Jeff Callier

This is the best CB antenna mount I have ever used on a tractor trailer. The only issue I have is that when trying to install them on my 2013 International tractor I found the bolts were not long enough as International have switched to thicker transom mounts. I'm not sure about other newer trucks, but you may need to use longer screws to install them properly. It is unlikely to slip when worn as it has grooves on either side of the attachment. I've used cheaper mounts with pull grooves on just one side so this is definitely better.