Corners on a Rail System require “double posting”. The Spectrum Corner Mending Plate Set is used to join the top mounting plate assemblies included in each post kit when “double posting”. The mounting plates feature angled ends which allows installers to meet 90 degree or 135 degree angles at corners. The hole patterns match those of the mounting plate and attach using ¼” screws and nuts. It is made from stainless steel and powder coated in standard color options of black, metallic silver, white and dark brown.