3M™ Class 1 DBI SALA® Nano Lok™ Self Retracting Lifeline with Anchor Hook, Web, 6 ft. pressure gauge The anti slide back D ring plate The anti slide back D ring plate design helps reduce dorsal D ring slide and enables a convenient adapter location for connecting personal SRLs All DBI SALA® lanyards incorporate our patented self locking snap hooks which are widely recognized in the industry for their user friendly operation and are preferred by safety professionals and workers alike These features are key safety improvements and provide the user with the comfort and support required to get the job done right or connection directly to a harness