Guardian Permanent Adjustable Standing Seam Roof Anchor* It features twin mounting bars using a total of eight (8) industry standard S 5 clamps for incredibly secure attachment to standing seams. * The clamps will not penetrate the panels or seams, ensuring the roof integrity is not compromised. * Adjustable from 12 to 24. * Compatible with horizontal lifelines. * Aluminum construction is corrosion resistant. * Swivel connection point reduces lifeline twists. ** Meets or exceeds all applicable OSHA