Can You Give Me a Hand with the Linking Rings?

Hey everyone!

This past Christmas, I was gifted a set of Ninja Linking Rings (I think that's what they're called, based on what I've found online). It's the four-ring set, smaller than the classic ones we all know, and the key ring (the gimmicked one) has a 'closed' opening; you have to push it to open it.

The problem is, they came without instructions, and I'm having a really hard time finding any tutorials on how to handle them and perform tricks with them.

Does anyone know how to use these and can give me a few pointers, please?

Thanks a bunch!