3 Pack Simpson Strong Tie HDU5-SDS2.5 13-3/16" Predeflected Hold Down w/SDS Screws 3"W x 13-3/16"H x 3-1/4"B 5/8" Anchor Bolt Diameter Pre-deflected body virtually eliminates deflection due to material stretch SDS 1/4"x2 1/2" screws are supplied with the holdowns Zinc galvanized finish containing 0.90oz of zinc per square foot of surface area (total both sides)