Material: Aluminium alloy, light in weight and durable. Can be used for both ascent and descent on a single rope. It is also equipped with a unique self braking system which initiates the brake a soon as the handle is released or clasped too tightly. It is provided with a safe locking eye which prevents the rope from sliding out, when operating as a descender. Equipped with polymer coated cover for comfort and ease during descent. Works on 10.0 mm to 12.0 mm diameter Kernmantle rope.