This is a Golden Rain Tree detachable key ring. The key ring has two key holders, but one end can be detached easily by pressing the plunger locking mechanism. The solid brass 10k gold plated parts work smoothly, and when the plunger is re-inserted, the key ring is locked securely in place. A highly polished lacquer finish was used to protect the wood. I love this type of key ring because you can have the house key on the detachable ring and the car key on the other ring. Then when you are in the car with the motor running and discover that you've forgotten something in the house, you don't have to shut off the engine. Just detach the key ring holding the house key and away you go. These key rings make wonderful gifts and are absolute treasures to own!