Swivl-Eze Stainless Steel Lock'n-Pin 3/4in Pin Base Boat Seat Accessory - 7in x 7in The Swivl-Eze Stainless Steel Lock'n-Pin 3/4in Pin Base Boat Seat Accessory gives an outstanding economical performance because the design has proven affective throughout the decades. The patented Lock'N-Pin system leads the industry in safety by preventing unitentional seat detachment. The Swivl-Eze Stainless Steel Lock'n-Pin 3/4in Pin Base Boat Seat Accessory exceeds the ABYC Standard H31.6.1 and interchange with other manufacturers' products is not recommended. Features: Non-threaded Acetal bushing 7in x 7in ABCY Code: B Mounting hole: 2-3/4in Depth below deck: 2-1/2in