The Horn supports the hand, protecting it from violent blows against the wall. It also is a safe and balanced support for the ice axe against ice. The Horn can be detached when a completely free spike is required. The Horn fits on all Grivel ice axes, even on the earlier models that have a spike with a clip hole. The Horn is a must have for "leashless" climbing. WARNING: The Horn has been designed only as a support for the climberís hand. It must never be used for belaying either the climber or partner.