The term GOLF CLUB HEAD SOCKET is composed of two words, HOSEL and socket. The hossel is the part of a golf club head that connects the shaft to the head. It is usually made of metal and is designed to fit snugly into the socket of the club head. The socket is the part of the club head that the hossel fits into. It is usually made of plastic or rubber and is designed to provide a secure connection between the hossel and the club head.