I read in a comment that it does not fit the PAX A80, but I decided to take the risk and try it. As shown in the photo, it may not fit perfectly, but it does its job and the POS is not at risk of falling.
As a construction, it is okay. Simply, for POS devices with curves, it is not the best, as it would need slightly larger "teeth." The positive thing, however, is that you can adjust them as you wish.

The base seems sturdy for its price, but its rotation is very sensitive, causing the terminal to hit the end with every slight movement.

I use the sticker (3M) to hold the base and because only I use it and respect it, it hasn't come off! The only "bad" thing is that it rotates 90 degrees and only from one side, so it requires a little study before installation to be 100% user-friendly with the customers.

We have placed it on the desk only with the adhesive it had, without the screws, and it's fine, it holds up. Very good purchase, worth it.

It was placed on a glass surface, without screws, only with the 3m adhesive that was included in the package. Excellent quality, stability, durability (as it rotates).
No problems or disadvantages so far.

Everything is good with this one, it rotates smoothly and the cable management is satisfactory. It has been used in a store with heavy card usage. For its price, it is value for money.

Very good and stable, just need to adjust all the side hooks from the beginning. They need to be unscrewed and repositioned at higher points.