Mid Size Wallplates - Screwless Polycarbonate Decorator. Rugged construction reduces installation cost due to less plate breakage and resists bowing to provide a smooth, flat installation. Exclusive timesaving Screw-Catch feature that holds mounting screws captive and simplifies installation. High gloss finish is soil resistant. Polycarbonate wallplates are virtually unbreakable, with high structural rigidity, long-term form retention, and superior impact and abrasion resistance. Matching mounting screws provided.