That would be fine for short term use.
A couple of things I'll add.
Tram is a Chinese company using an old American CB brand name. Quality is not impressive, as you can guess. I've looked at the Tram and Browning products at trade shows and I was not impressed.
You may save a few bucks going with Tram, and that might be fine for a short term solution, but if you plan on keeping this for many years, spend the extra few bucks and get the Larsen or Laird brand mounts. Higher quality, known brand name, etc.
Magnetic mounts can damage the paint. Make sure you clean the area where the magnet will sit very well, and clean it often. Dust gets under there and will scratch the paint. Discoloration can happen if it's left on long term.
Make sure you route the coax in a way that it doesn't get pinched. Through doors and windows will damage the cable and cause issues in the long run.