Veppak- 2 Pack Clamp-On Boat Seat Swivel Base Mount, 360-Degree Rotation Boat Seat Pedestals and Bases , Adjustable 7.5-18 Inch, Fits Jon Boat Kayak Canoe Marine Seats

["Smooth 360-Degree Rotation: 2 Pack Veppak Boat seat swivel base mount equipped with 58 full metal ball bearings for stable and Smooth swivel movement, enhancing comfort and control while fishing or navigating","Durable & Corrosion-Resistant: Features black powder-coated material that withstands harsh marine environments, ensuring long-lasting performance","Adjustable Height & Universal Fit: Veppak boat seat pedestals and bases can adjust from 7.5 to 18 inches to fit most boat seat mounting holes, offering flexibility for various boat types","Easy Clamp-On Installation: Securely attaches to jon boats and kayaks with bracket hole slots spaced 5\" to 6\" apart—no drilling required for quick setup","Secure Locking Mechanism: Wing nuts provide a firm hold to prevent loosening during use, ensuring safety and stability on rough waters"]