Bison Level.Up Joist Top Attachment is an accessory for the Bison Level.Up Adjustable Deck System. The Bison Level.Up Deck Pedestal System provides a new way to build ground level and low profile decks by eliminating the need to install concrete footers. Level.Up Joist Top Attachment fits atop the adjustable deck support pedestal to secure either 2x or 4x lumber to build wood joist and plank decks. Level.Up Height Joist Top Attachment fastens to the adjustable deck pedestal with a screw. Flexible built-in mounting brackets with pre-drilled holes bend up to wrap around and fasten to 2 inch or 4 inch wide joists using #8 exterior screws. Made of engineered polymer that is weather and freeze resistant for lasting durability.