The Black Diamond Index Ascender is a robust workhorse engineered for hard-to-clean-pitches and wild conditions. It features a trigger release for fast, effortless operation on hard-to-clean pitches and uses an ergonomic, dual-density grip to increase comfort for long days on the wall. Lightened frame Ergonomic dual-density grip Trigger-finger release for fast operation Aggressive teeth for extra grip on icy ropes Large carabiner clip hole Left and right-handed versions