3M DBI-SALA Ultra-Lok 3504550 Self Retracting Lifeline, 50', 3/16" Galvanized Steel Wire Rope, with Swivel Snap Hook, and Rsq Dual-Mode, Yellow Reserve lifeline system RSQ dual-mode design Rugged and extremely lightweight thermoplastic housing Semi-sealed design 50 ft (152m) of 3/16" (5mm) galvanized steel wire rope with swivel snap hook and RSQ dual-mode