This 3/8” drive socket is unusual and I’m not exactly sure what is meant for. Maybe a spark plug socket. It shows-524 on the side but no actual size. The socket looks to match with a 1- 1/16” open end wrench as you can see in one of the photos. It is unique deep inside the socket though. Not like most sockets. You tell me if you know what it’s meant for. I’m curious