I modeled this Renault key holder body based on the Kreativni Studio Sale keychain design. It's possible to insert a blank key and there's a hole for a 3mm plastic screw. There's no slot for the chip; it was just to have an extra key to open the door or the fuel filler flap.

-- Edit --

Model was too thin for my liking, so I made a thicker v2 to reinforce it. I'm also including the new f360 file.