Fore & AFT Seat Slide Pedestal Mount - Fits 2-7/8" Post This seat slide pedestal mount has a 5-1/4" hole pattern and fits virtually all marine seat brands.Features:Cast aluminum mounting construction with injection-molded plastic handlesExtruded aluminum seat slide allows for 5" of fore and aft travel360° rotation with a locking knobLocks into pedestal posts with pre-tapped adjustment holesClass AD certified per ABYC standardsSpecifications:Post Size: Fits a 2-7/8" diameter post