GRK Fasteners - Patented Screws - Thunder Bay, Canada GRK Washer Head
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R4™ Multi Purpose Screw Pan™ Head Screw RSS™ Rugged Structural Screw Cabinet™ Screw FIN/Trim™ Head Screw RT Composite™ Trim™ Head Screw KAMELEON™ Composite Screw Top Star™ Shim Screw Vinyl Window™ Screw Caliburn™ Concrete Screw MSS™ Metal Siding Screw
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R4 Multi Purpose Screw Ubergrade

GRK Fasteners ÜberGrade Media Kit

There's ProGrade...
    and then there's

        ÜberGrade!
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