3M DBI-SALA 30′ Sealed Blok Self Retracting Lifeline With 316″ Galvanized Steel Cable And Swiveling Impact Indicator Hook helps to remove grease, moisture and dirt from motor spring and brake. It has environmentally sealed design for safety and swiveling anchorage loop helps to prevent twisting of lifeline. self-adjusting disc brake used for reliability and reserve lifeline retention system offers added safety. Stainless steel and cast aluminum housing offers resistance against corrosion and meets or exceeds all industry standards including OSHA, ANSI and the stringent ANSI Z359.