Belays enable climbers to stop fellow climbers during a fall. Therefore, belays are an essential safety device in climbing. Learn how to use belays in this climbing video tutorial. Take action: use a high friction rope device, have a large carabineer, communicate with partner, and consult your local outdoor store. 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.