For use on roofs from flat to 12/12 pitch, wood or metal. 5000 lb. anchor point. Fasteners included. Tested and approved for metal roofing applications, minimum 20 gauge metal or thicker, attached directly onto the surface. For metal installation: use (16) screws (8 per side), 6 in center column of fastener installation holes, in 1 hole left of center and 1 hole right of center. Guardian recommends HILTI Kwik-Pro self-drilling screws.