Parafast® metal plates are made of Galvalume® coated steel. The round design provides an even distribution of loads and eliminates sharp corners that can damage the rigid insulation or membrane. The Parafast® Standard Plate utilizes a tri-rib design and can be used over high compressive strength insulation and substrate panels. Parafast® plates are used for fastening insulation, substrate panels, and base sheets in approved assemblies. These plates are designed to be used with Parafast® Fasteners.