The S-5-U clamp is by far our most popular and most versatile clamp. It will fit about 85% of the standing seam profiles manufactured in North America including most structural and architectural profiles. It can be used on vertically oriented seams, and by rotating the clamp 90 degrees, it can also be used on most horizontal 2 seam profiles. Its simple design, generous dimensioning and multiple hole orientations are what make it so versatile for use with S-5!® snow retention products and other heavy-duty applications. Its simple design and ample size make it so strong and versatile it can be used with S-5!® snow retention products like ColorGard, and other heavy-duty applications. Not for use on horizontal seams with less than .65″ widths. The S-5-U clamp comes complete with two [2] 3/8″x 24 x 0.80″ round nose set screws and one [1] M8-1.25 x 16mm Hex Flange Bolt. All hardware is stainless steel.