Hi @rwenn - Thanks for reaching out!
After our first round of searching, we have not been able to find more information on a keychain that matches the one pictured. Do you know when you made this purchase? That could help narrow down the options. Also, if you are an REI member your past purchases can be searched and you may be able to find your keychain's name and brand that way. That information can be found by looking on your REI.com Account or by contacting our Customer Support Team.
If we are unable to find information on this specific product when we search further, are there any features in the keychain that you are specifically looking for? We would be happy to point you in the direction of a good alternative.
Thanks for your patience as we tracked down this information. It looks like that is a Bison Designs Circle Key Caddy. While REI no longer carries this particular product, it does look like they have them available to purchase from their website.
Hopefully this helps, thanks!