Petzl Auxiliary Brake for I’D Series Features: • May be used to increase friction with the weight of the load and diameter of the rope • Designed for I’D S, I’D L, and I’D EVAC self-breaking descenders • Two Versions: o Open - used to release the rope at any time o Closed – Provides a constant redirect of the rope, once installed it can not be easily removed, suited for use in rescue kits The Petzl Auxiliary Brakes are designed for I'D self-braking descenders. It may be used to increase the friction in accordance with the weight of the load and the diameter of the rope, or to release the rope at any time. It comes in two versions: open and closed. Specifications: • Weight: 20 g