Index RightEngineered for hard to clean pitches, wild conditions and long days, the Black Diamond Index Ascender is a robust workhorse for jugging in all weather. The ascender's trigger finger release allows for hassle free operation and its molded grip and lightened frame offer quick maneuverability and mobility. With aggressive teeth, the Index is primed for gripping icy ropes, and a large clip in point and left and right handed versions add compatibility.