Simpson Outdoor Accents® adjustable post bases secure posts or columns to concrete, ideal for pergolas, patio covers, and other top-supported structures. Part of the Outdoor Accents Mission Collection®, these bases feature decorative southwestern edges and are made from ZMAX® galvanized steel with a black powder-coat finish for corrosion resistance. They install with Outdoor Accents structural wood screws and hex-head washers (sold separately), offering a decorative bolt-like look with the ease of screw installation. APB models also include a 1" standoff to prevent post-end rot from moisture.