Features: brand new and high quality Outdoor downhill mountain climbing caving expand high-altitude operations, such as fire and rescue. The design makes it grip firmly, but will not damage the rope. It is widely used as a protective assistant in uphill, mountaineering, cave exploration and other sports. Climbing descent device V-groove friction, Increase the friction, and for play a slow downward effect. High strength aluminum alloy material has the characteristics of high strength, light weight and convenient carrying. Double row rope holes can be used with single rope or double rope. Specifications: Material:Aluminium Alloy Color:Orange / Purple / Red Size:4.4x8.7cm/1.73x3.42inches Package Includes: 1 x Rope Lowering Device note: Please allow 0-1cm errors due to manual measurement, make sure that you do not mind before you order.