The magic ring of a thin wrench does not seem to work as expected. Since the ring just fits in the groove, it doesn't fit neatly into the hex screw head and the ring appears to be half off. It fits neatly into the hex bolt. It seems to be a problem of machining accuracy on the screw head side. It tends to be overall and does not seem to be suitable for complete tightening work. Screws and bolts that are hard to reach can be tightened without fingers and loosened either with a magic ring or with a magnet without a ball point, so the overall product is a passing score.
(Translated by machine.)