The strength of the S-5-R465 clamp is in its simple design. The clamps are uniquely designed with opposing setscrews to maximize holding strength. Go to the tools page for information and tools available for properly attaching and tensioning S-5!® clamps. The round-point setscrews do not penetrate the weathering membrane of the roof, nor damage the protective Galvalume coatings of steel panels. They will not cause scoring which can lead to roof material fracture or premature corrosion, including rust, thereby voiding the roof manufacturer’s warranty.