Cordelletes, slings and prusicks are three of the more specific-use elements of rock climbing equipment. Learn how to use prusicks, slings and cordelettes in this climbing video tutorial. Take action: slings can be used to clip gear or set up anchors, prusicks are back-up descending device, and use a cordelette for anchor or for prusick. Josh, the instructor of this how-to video from Live Strong, is an avid climber that resides off the coast in central California. He has managed for a mountaineering sports company for several years and loves the sport.