Single Spring: Makes it impossible to lose the ice axe • Leaves hands free • Long when required • Compact when required An elastic sling system to avoid losing tools when climbing on rock or ice. This solves the problem for climbers who love climbing without a leash. The Single Spring is attached to the harness. The small carabiner is hooked onto the hole on the axe’s head when using it to lean on when walking or through the hole on the spike when holding the shaft in traction. In both cases it is impossible to lose the axe. The system allows the climber to swap hands or tool easily.