3/4" pin pedestal design uses patented Lock'N Pin technology for safety and versatility.Includes 11" brushed aluminum 2114 post, black E-coated 1002 seat mount with spring and 7" x 7" non-threaded 67739 base plate. Drop-in components easily slide together, then lock” into place to prevent unintentional detachment.Key FeaturesDurable stainless-steel base plates install flush with boat deckLock' N-Pin prevents unintentional detachment for seat mounts, posts and basesLock' N-Pin products exceed ABYC Standard H31.6.1Type B rating, not to be used as a helm seat, for speedsnot to exceed 5mphBase plates require a 2 3/4" clearance below deck and have 5/16" countersunk mounting holesMounting screws not includedMade in the USA