Swivl-Eze™ Lock'N-Pin™ 2-3/4" L Black E-Coat Seat Mount with Spring & Base Plate for 3/4" D Post, Aftermarket (SP-1002) by Attwood®. Whether for seat replacement or installation, this sturdy and dependable seat mounting solution will make the process fast, easy and worry-free. Constructed from top-notch materials to withstand punishing marine conditions, it will provide proper and secure mounting of your boat seat, ensuring reliable function and long-lasting service.