The mechanical rope device Rope Runner Vertec was developed by Notch together with the inventor of the original, Kevin Bingham. The device can be used for ascent on a single rope (SRT), for climbing on a double rope (DdRT) and also for descent. It is made of hot forged aluminum and stainless steel and has well thought-out ergonomics and rope-friendly edges. This enables smooth, comfortable climbing in the tree. The Rope Runner Vertec can be installed in the middle of the rope. This is done by opening the device. The Rope Runner Vertec can stay securely on the harness while the rope is being inserted. The upper pin is tool-free adjustable to adapt the device to different rope strengths and the weight of the climber. With a central attachment point for chest harnesses, ball bearing pulley and an internal spring.