The 3M™ DBI-SALA® Ultra-Lok™ self retracting lifeline, 3504433C is a self-retracting lifeline (SRL) designed with an anti-ratcheting self-adjusting twin disc brake system that stops a fall within inches to keep you safe when you're working at heights. Equipped with 20 ft (6.1 m) of 3/16 in (5 mm) galvanized steel cable and thermoplastic housing, this SRL also includes corrosion-resistant hardware-a swiveling anchorage point and a swiveling snap hook with impact indicator.

Ultra-Lok™ self-retracting lifelines (SRLs) are backed by decades of proven field service for absolute confidence, safety and reliability. An SRLs 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 stopping the fall and reducing the forces imposed on the user to safe levels.