Lightweight, high-strength guided fall arrester designed for vertical rail systems. Integrated with external rail tracks, it offers an ideal alternative to traditional cable lifelines, perfectly suited for structured ladders and vertical rail systems. The continuous double-action mechanism prevents accidental opening while ensuring smooth and safe attachment to the lifeline. Equipped with an integrated rotating hook (H19L) for full mobility and an energy absorber that reduces fall impact forces to below 6 kN. The fast-acting lock engages immediately during a fall, keeping total fall distance minimal and controlled.