Rollgliss™ R550 Rescue and Descent Device, 100' L, Kernmantle LifelineEmergency rescue and evacuation from a wide variety of elevated work areas Fully automatic controlled descent Bidirectional design enables multiple rescues Built in rescue lifting wheel 100 ft. (30. 5 m) 3 8" (9. 5 mm) kernmantle rope lifeline Rated for up to 1,640 ft. (500 m) height for one user, 575 ft. (175 m) for two users Compact and lightweight design High strength corrosion resistant construction Integrated rope ears Dual brake design Equipped