Springfield's 1100031-1 Trac-Lock Pedestal Swivel features a 2-3/8" post mount with bushing for a close fit. It is a 7" x 7" non-locking swivel and is constructed of high-strength aluminum with a powder coat finish to withstand harsh marine environments. This swivel rotates up to 360 degrees and adds 3/4" of height to a pedestal. Use with any 2-3/8" pedestal.