PRIMAL THE DESCENDER DEVICE The Primal Descender Device lets you down easy if you fall. This device provides an automatic, hands free, controlled rate descent and works with your existing full-body harness (harness must meet ASTM standards for fall arrest system). Features up to 25’ of descent. Includes 1 tree strap, 1 descender, 1 carabiner. One time use for customer safety. Weight capacity is 120 - 300 lbs.