Very good level. It measures from below and from one side. The ones that have the groove in the middle. And they also have a magnet. However, one disadvantage that I noticed as an electrician in practice is that when I put socket switches and level the metal frame before putting the plastic frame, the level does not "catch" this groove because as you will see in the photos I posted, the black surface which is leveled does not extend to the entire surface but is about two millimeters smaller than the red surface which is not leveled. That's why it is good for a level to have flat surfaces that measure from one end to the other.

Good quality construction with a very good magnet and great clarity of the bubble level. Due to its small size, it is very convenient, it doesn't take up space in your tools or where you store it, and you can have it in your pants pocket without being particularly bothered by its size.

The magnet, in combination with the notch it has on the bottom sides, has solved my hands. Mainly when I screw TV mounts on the wall.

The magnet of it works to such an extent that you are not afraid but at the same time it does not tire you. The quality of the bubble level is excellent, with exceptional readability even in low lighting. I preferred the set with the belt case for greater ergonomics, although I believe that you will not have a problem regarding its stability.