The Vault Key Case is a very well-designed product that makes a great competitor in this space! The case is strong, and designed around the hinge mechanism, which also houses the additional 'key ring', which is held tightly. Even when the key case is pulled all the way open, some effort is required to dislodge that part. Putting keys in is easy, and much less fiddly than what I found with my old Orbitkey. The case holds as many keys as advertised, and I'd argue it can hold another just fine.

A minor gripe I have is that it doesn't QUITE fit my Yubikey Security Key. Obviously, it's impossible to design around every product with a keyhole, but it's worth noting if anybody else does have one. Technically it will fit it you force it, but that will definitely damage the case and the Yubikey over time. Thankfully, the Yubikey 5C fits just fine, but that's just down to the fact that it has a sizeable keyhole.

Overall, the Vault Key Case is shockingly well-designed for its price, and I certainly recommend it.