ATC-Guide from Black Diamond is an extra versatile, lightweight and high performance belay and rappel system. The self-locking release eyelet is large enough to accommodate a small carabiner. Multi-braking modes for optimal stopping power when top-roping or rappelling. Guide mode to belay one or two climbers on the ascent or descent. Wear-resistant cable that does not deform or interfere with the strings. Suitable for ropes from 7.7mm to 11mm. The most versatile of the Black Diamond range!