Ultra-Lok self retracting lifelines (SRL?) are rugged, yet extremely lightweight and superbly engineered Device you can count on for safety, efficiency and comfort. Stainless steel components, an anti-ratcheting brake system and a semi-sealed design PRO ide the user with a system built to last. Our SRLs are backed by decades of PRO en field service for absolute confidence, safety and reliability. An SRL? lifeline will extend as the user moves away, and retract automatically enabling the user to move about within a recommended working area at normal speeds. Should a fall occur, a speed sensing brake system will activate Stop ing the fall and reducing the forces imposed on the user to safe levels.