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 in (11mm) rope, the Anthron descender, and two carabiners. Proper roping & rigging diagrams are on the side of the device, which can be installed or removed at any point on the rope & has a working load of 300 pounds (136 kg).