The Anthron descender is a manually operated, controlled descent device most commonly used for suspended work positioning, self-evacuation, or rescue operations. A cam assembly provides friction on the rope to hold a load or allow the load to descend at a controlled rate. The system consists of a 7/16" (11mm) rope, the Anthron descender, and two carabiners. Proper roping and rigging diagrams are on the side of the device, which can be installed or removed at any point on the rope and has a working load of 300 pounds (136 kg). MSA Anthron Descent Device System, 300 lb Weight, Specifications Met: EN 341