The ring does exactly what it should: it allows fast, attach brand gentle or remove keys on a key ring. This works fine, well I never had a problem that would have solved something unintentionally. I recommend the variant with the additional 3 small rings, because they are very shallow and both "technical" and visually perfectly match the major magic ring. The price is a bit high for my taste, but here you pay at the same time the idea and the marketing. For this you get exactly what you wanted, in a good quality and optically pure. I would buy it again.