This brass meat jack is a rare and interesting piece. Quite old, circa 1830. It was used to swivel meat back and forth while cooking in the fireplace. I'm not sure if it is in working order because I don't have the key. I have been told that it uses a key similar to a clock key. The photo shows a little round door that swings back to reveal the spot where the key goes. It is embossed with a tree, the name John Linwood and the word Warranted on the front side. It also has the number 7, and the word warranted on the bottom. I think that means it can turn up to seven lbs. It is 15" long from the loop on the top to the hook on the bottom, and 4 1/2" D. at the bottom.