Magma Socket Type Rod Holder Mount This Magma Standard Duty Rod Holder Mount is designed for use while anchored or moored. Though strong and versatile, should be stowed while underway. These mounts are designed to fit the most popular plastic rod holder sockets. They quickly disconnect without tools for compact storage, designed to stow with the grill while underway. Rod holder sockets not included. Fits 12 18 or smaller rectangle grills and tables. Fits Tempress Fish-On Roberts Rod Holder Sock