After a long day at a 1910 house I finally stumbled on a decent high tone signal. I pulled it out and saw what appeared to be a shotgun shell. Shotgun shells normally read like a nickel, so I was a little puzzled. After I got home and cleaned it up, I realized someone had fashioned 2 shotgun shell to where they would fit together like a small case....Then I shook it! There was something inside!! I could not believe it! After prying them open, I was astonished to find 3 pieces of buckshot....I had never been so let down. I can only think what in the heck was the point of that.