Power Pro 5/16 In. x 3-1/2 In. Structural Lag Screw is designed for heavy-duty fastening applications where strength and durability are essential. This lag screw is i for securing structural components, providing a reliable hold in wood and other materials. Its robust construction ensures long-lasting performance in various construction and repair projects. Whether you're working on framing, decking, or other structural tasks, this lag screw the strength needed to get the job done efficiently and securely.