S-5! metal roof solar panel mounting clamps attach to the panel seam by tightening the “bullet-nosed” stainless steel setscrews against the seam material. The setscrews compress the seam material against the opposite wall of the clamp. They will “dimple” the seam material, but will not penetrate it. Threaded holes in the clamp (and stainless hardware provided) enable the easy attachment of various ancillary items to the clamps. Our clamps are an effective solution to attach solar panels to your metal roof while limiting permanent damage to the attachment area.