Installs to rebar ring during pre-cast concrete work. Installs in seconds utilizing built-in ratcheting securement system. Built-in ratcheting securement system allows a user to secure anchor in place quickly. Dual-use design can also be used as end anchors for a 2-person temporary 3M DBI-SALA® HLL System. For use with 3M DBI-SALA® Smart Lock LE Self-Retracting Lifelines (Sold Separately). Stay on top of projects with 3M DBI SALA® Roof Anchors. The versatility you need when working at height. 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 for comfort and productivity with reduced unintentional lockups.*Compared to our previous generation SRLs. Swiveling Self Retracting Lifeline Bracket: Provides freedom of movement around the anchor. Compact and Lightweight Design Features: fast and easy attachment for added productivity. Durable Construction Stands up to tough work environments. Installs in seconds utilizing built in ratcheting securement system. Built in Ratcheting Securement System. Allows user to secure anchor in place quickly without special tools. Dual Use Design. Can also be used as end anchors for a 2 person temporary 3M DBI SALA® Horizontal Lifeline System. For Use with 3M DBI SALA® Smart Lock Leading Edge Self Retracting Lifelines (Sold Separately), designed to know the difference between regular movement and a fall-reducing unintentional lockups.*Compared to our previous generation SRLs.