Outdoor box to mast connection?

I am putting together an exterior enclosure for the Pi and electronics that will be roof mounted.

Those of you that have done this, how are you attaching the box to the mast?

Burke,
I use this, however, it is way over priced for a piece of plastic and a few bits of metal.

Jon

My box had four “ears” with holes and I have used some copper wire trough those and wrapped once around the pipe. Tighten with pliers.

I use a 3 legged tower and fasten my to the tower legs, and use 3meters of LMR-400