The UltraFast® Plus Plate is made of Galvalume® coated steel. The nominal square plate is thicker than the standard UltraFast square metal plate, providing a stiffer surface area to improve wind uplift performance of the system. The plate is designed to be used with UltraFast #12 or #14 fasteners. The plate is used for fastening Invinsa® Roof Board to the roof deck in fully adhered single ply systems.