The Shoxs pedestal comes standard with a square adapter plate that pairs with a boat seat with a traditional 5 1 / 4-inch hole pattern. Remount your existing helm seat with this plate using a ...

Check under the deck for interference before drilling. For a deck less than 3/4-inch thick, use a backing plate, which can be fashioned from a 3/8-inch-thick plate of aluminum, pre-drilled to the hole ...