No visible fasteners on deck board face Fasteners that are attached to the joists are hidden by the subsequent deck board This hidden fastener system allows air to flow between the deck boards and the joist, enabling the joists to continually dry out (preventing the acceleration of rot) No expensive biscuit cutter required No hammering Works well with exotic hardwoods and composite decking Approx. 100 sq. ft coverage using 5.5" deck boards 16" o.c. Screws Included