7" x 7" Lock'N-Pin 3/4" Pin Base SP-67739-T is stainless steel with steel lip tube. It features a threaded bronze bushing for secure fit and durability. Easy to install with six screws or bolts through the deck. Add more seating to your pontoon, fishing or cruising boat with Attwood seating products. Attwood develops high value, engineered marine products to make life on the water easier to enjoy. Made to meet the demands of boat builders and distribution partners, our products are extensively tested on-site in our lab to provide worry-free boating under all conditions.