I still do not know exactly what can I say about the product, it feels more stable than it looks, but no clear mechanical concept can be seen. The opening for "threading" of small rings is also in unpressed state 1-2mm off, but can be as intended when you press the key ring zoom. In good and the whole product works, it is stable, but I would have hoped for more "clarity" in the mechanics and functioning. Who has keys separate from the day his keyring / wants should choose another alternative, who only occasionally want endfernen times one or the other key here is probably just right.