Installs to sloped or flat wood and metal decking roofs. Anchor can be installed to a variety of roofing materials to provide a tie-off point. Fast and easy installation. Secondary D-ring can be used with HLL system and allows user to tie-off to anchor with lanyard or install a 3M DBI-SALA®HLL between two anchors. Portable and reusable. Anchor can be removed and reinstalled. Stay on top of projects with 3M DBI SALA® roof anchors. Whether your roof is flat or sloped, wood, metal or concrete, there's a 3M DBI SALA® roof anchor to help you get the job done efficiently and securely. They're easy to install and rugged enough to handle tough environments. Pair these roof anchors with the 3M DBI SALA® smart lock self retracting lifeline (Sold Separately) for comfort and productivity with reduced unintentional lockups. Compact and lightweight design features: fast and easy attachment for added productivity. Durable construction stands up to tough work environments. Installs to sloped or flat wood and metal decking roofs. Anchor can be installed to a variety of roofing materials to provide a tie off point. Fastener kit includes 16 ea. 1/4 14 x 2-1/2 in self tapping screws for steel installation and 8 ea. 1/4 x 2-1/2 in lag screws for wood. Secondary D ring can be used with horizontal lifeline system and allows user to tie off to anchor with lanyard or install a 3M DBI SALA® Sayfline horizontal lifeline between two anchors. Portable and reusable. Anchor can be removed and simply reinstalled in a new location for added jobsite flexibility.