Roll-in docks. 6 reasons why more people buy floe modular roll-in aluminum boat docks than any other in the world! gorgeous shorefront appeal; rock solid stability;. Shop our selection of boat docks in the building materials department at the home depot.. The x-9 system is constructed out of a completely proprietary 9.5″ x 3.5″ 6061-t6 aluminum solid extrusion. 6061 is the ideal material for aluminum dock.
