Believe it or not I have one of these at home. It was my grandma's. The is a jar opener. My grandma used to have tons of jars because she used to have tons preserves and when grandpa was not around to help her opening the jars, she would use this. I wonder if they still sell these jar openers. My mom would hit the jar against something to loose the lid. So did you know this was a jar opener? SHARE if you did.....