The extruded aluminum profile shall incorporate a continuous integral fin for surface contact to conventionally installed gypsum drywall. The fins shall be 7/8" wide and shall be tapered to the edge. The tapered fins shall be punched with holes staggered to accept standard screw fastening. A series of continuous grooves shall be extruded into the face of the fins to provide greater bonding surface. The extruded profiles shall be primed with corrosion-resistant primer compatible with materials normally in use in conjunction with commercial interiors, i.e.: joint compound, latex and enamel paints, and wall covering adhesives.