The Rugged Structural Screws (RSS™ for short) are made with specially tempered steel to provide high tensile, torque and shear strength. Use these screws wherever you might otherwise have chosen Lag Screws. The extra sharp threads and point bite into wood reducing the splitting you sometimes get. They have a built in washer head to reduce “pull through” or dimpling into the timber when tightened. RSS™ screws which are 3-1/8" and longer have a six threaded CEE thread that enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increasing the screw’s drawing strength. The CEE thread also reduces the likelihood of splitting the wood and the friction on the screw shank which can result in lowering the driving torque. Like the R4™ screws, pilot holes are not required for these screws because the #30 Star Drive will deliver approximately 650 ft-lb. of energy, eliminating the need to drill a pilot hole. Pilot holes are only needed if the building material manufacturer requires it. Always check with the manufacturer’s literature for installation recommendations. Use these screws for attaching ledger boards, constructing retaining walls and for timber framing. The shorter versions can be used for installing wire diamond mesh for stucco buildings. Self-tapping, W-Cut thread design and Zip-Tip™ point. Also available in 305 Stainless Steel which has a limited lifetime warranty against staining and rusting. Imported.