Ascenders are one of the types of equipment used in aid climbing. Ascenders allow the climber to maintain his progress when taking a break. Learn how to use ascenders in this climbing video tutorial. Take action: consult your local store, attach with carabineer, and use teeth to create gripping friction. Josh, the instructor in 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.