GRK RSS (Rugged Structural Screw) Structural Screws are designed for strong, secure wood-to-wood fastening in structural and construction applications. Ideal for connecting beams, posts, framing members, and other wood components, these screws provide reliable fastening for demanding building projects. The 4" length is suitable for a variety of structural wood connections, including deck framing, timber construction, and general carpentry. GRK RSS screws offer a practical alternative to traditional lag screws in compatible applications. Follow the manufacturer's installation instructions for proper use.