The Simpson HDU2-SDS2.5 Predeflected Holdown is a joist hanger designed by Simpson Strong-Tie. Made fromgalvanized steel, wood, and steel, this holdown has a length of 9 inches and a rail height of 7.31 inches. It comes with screws for easy installation and has a galvanized finish for corrosion resistance. This single pack model 886-ATMS is a strong and durable solution for supporting beams in various building projects.