ATC-Guide from Black Diamond is an extra versatile, lightweight, and efficient belay and rappel system. The release eyelet of the auto-blocking device is large enough to accommodate a small carabiner. Multiple braking modes for optimal stopping power when top roping or rappelling. Guide mode allows for belaying one or two climbers on ascent or descent. Wear-resistant cable that does not deform and does not hinder the ropes. Suitable for ropes from 7.7 mm to 11 mm. The most versatile in the Black Diamond range!