TRUFAST Metal Insulation Plates are used to mechanically attach insulation, coverboards and BUR base sheets to the substrate. The plate's circular design and reinforcing ribs provide exceptional strength to resist wind uplift forces. TRUFAST Recessed Metal Insulation Plate has a deep center recess to accommodate hex headed fasteners and prevent screw heads from snagging mops and penetrating into membrane. It is used to attach roof insulation to the substrate and should only be used over compressible insulations.