attwood 7X7 Aluminum 3/4-Pin Base 7" x 7" lock'n-pin 3/4" pin base is aluminum. It works with non-threaded 3/4" pedestal pins and features an acetal bushing for secure fit and durability Brushed aluminum finish for appealing look and corrosion resistance 7" by 7" aluminum base Six bolt or screw attachment (hardware not included)