Shown is the Reeves GuardAll Safety Rail System. The Multi Purpose System will attach to a deck, parapet or slab. You can purchase the MultiPost that adjusts in 3-inch increments to allow for the height of the parapet. The MultiPost allows you to use two-by-fours or cable. There is also an optional bracket that attaches to the clamp for a four-by-four upright. For more information, visit www.reevesequipment.com.