Retractable lifelines provide extreme durability with high mobility. These units offer an extended range of movement, zero slack to eliminate tripping hazards, and a centrifugal braking system that engages at the slightest of falls! Model RL50G is a 50 foot retractable lifeline. Super-strong cast aluminum housing featuring a dual internal inertia braking system, interal deceleration braking system, swivel impact indicating snap hook and galvanized wire cable.