I'm not sure if this is Sterling or not but it sure is magical piece for a man who needs it. This will give strength, protection for all matters and Stamina in the bedroom and out. I'm not saying that men only want these things but this is just made for them.
To use the piece you can put it in your pocket with no need to wear it. This holds a spirit of a ancient Japanese warrior found buried deep in the Earth. His name is Kazan and you will not have to interact with him at all. He will get along with any other spirits you have because he doesn't interact with them. He stays to himself but will do what he needs to do as far as protection, strength and stamina.