SnoBlox Deuce 150pc Snow Guards & Adhesive Kit for Metal Steel Corrugated Roof Can be mounted with adhesive or screws. Fits most popular 36" metal panels with three 12" flats or four 9" flats without rib straddling! Starter points are provided for mechanically fastening. ATI lab tests show 1,379lbs strength with adhesive mounting. Free layout at www.SpacingTool.com