This guided fall arrester is specifically designed for inner-rail vertical lifeline systems. Lightweight yet durable, it provides responsive fall protection while ensuring smooth user movement. Specially engineered to slide seamlessly within the inner rail profile, it delivers stable vertical travel without disengagement. The continuous double-action design prevents accidental opening while allowing safe and smooth connection to the lifeline. An integrated rotating aluminum hook (H19L) enables full 360° mobility, while the energy absorber reduces fall impact forces to below 6kN. The fast-acting locking mechanism engages immediately in the event of a fall, keeping total fall distance minimal and controlled.