TRI-LINEAR RIGIDITY

Combination of locking mechanism, lip, and return for vinyl siding, namely, a double nail hem at the top of the vinyl siding into which nails are driven for securing the siding to a building wall, a large return in the middle, and an oversized locking system consisting of a double nail hem on the top and a bottom flange having a upturned locking lip, all sold as a unit as a component part of vinyl siding