Now a common name around the climbing world, Petzl's popular belay device is perfect for top-roping, gym-climbing and sport-climbing. Super safe and effortless. Great for beginners or the seasoned pro. Petzl GriGri Belay Device Features: On belay, slow rope movement runs freely, while falls and shocking loads initiate the braking cam and help stop the rope. While lowering a climber, one hand controls the rope, regulating speed and braking, while other hand holds brake lever open. Stamped diagram on side of Grigri illustrates proper setup; less chance of confusion. Each unit individually tested for quality and safety.