Petzl RIG Self-Braking Descender. D21A (Gold), D21AN (Black). $170.00. The RIG is designed for expert professional rope access technicians. It allows the user to position himself and then easily stop where needed by using the handle to block the rope. This descender is compact and intuitive to use, making for smooth descents. With its innovative design and compact size, the RIG is a simple and effective alternative to more traditional descenders. While the handle is in descent position, it will automatically return to belay position if the user lets go of it. This limits risks in case of involuntary operation of the handle, for example by user action, a falling object, etc. For single ropes between 10.5mm and 11.5mm. 380 g. CE EN 12841 type C, CE EN 341 class A, NFPA 1983 Light Use.