Springfield Marine® 1100012 - 8"-19" H E-Coat Steel Adjustable Jon Boat Seat Clamp with Swivel - BOATiD.com
Best seat mounting method for 12' aluminum fishing boat? - This Old Boat - Lake Ontario United - Lake Ontario's Largest Fishing & Hunting Community - New York and Ontario Canada
Garelick Adjustable Seat Swivel Clamp 75007 - The Home Depot
Amazon.com : Guide Gear Boat Seat Swivel Clamp Mount for Boat Chairs, Boating Accessories and Marine Equipment : Sports & Outdoors
Are clamp-on swivels any good? | Aluminum Boat & Jon/V Boat Discussion Forum