This is already my second holder in this design and I am very satisfied with it. Easy installation and very functional, handling is also very good. Have 2 VHF radio antennas mounted AIS, radio and radio. The holders do not need much space. At long Antennas 2,40m, however, you have to stiffen the rod extra, as a deeper toothing would be helpful to prevent slipping.
The antenna is great, just a pity that SVB first order an adapter so that the antenna fits on the available at SVB antenna holder. Or you can order the right antenna holder from another supplier.