This is the third time I’ve found one of these. They must be common enough but I drew a blank. I am the college educated one but just like Rosie in White men can’t jump, my wife is full of useless information and should be on a game show. I showed her and she knew exactly what it is and what it’s used for. So I’m going to put youse up against my wife. If you don’t know what it is, try asking your wife !!!