The Kong Descenders are devices used in creating a belay system to ensure that a falling climber does not fall too far. They are widely used in work activities like rope access, roof and inclined planes, arboriculture, tree climbing, sail boats, confined spaces, rescue activities like tactical, fire brigade, civil protection, and cableway evacuation, and sports activities like caving, canyoning, climbing, and mountaineering. The Kong Descenders are certified and conform to health, safety, and environmental protection standards. They are generally made of aluminum alloy and stainless steel. The Kong descender devices are available in various shapes and sizes, with some designed specifically for a single purpose.