Perfect for all of Grivel?s ice axes, from classical models to the most technical, from Nepal to Monster and the brand new Matrix.The part with the ring is attached to the ice axe?s head and the easy toggle system lets you hook up and release with just one simple hand movement. A natural rubber sling gives comfortable support to the wrist and the climber?s weight. Wrist sizes and length are easily adjustable with just one strap.