Piton, for one, is a type of SPIKE used in mountaineering and rock climbing. It is a metal SPIKE that is driven into a crack in the rock to provide an anchor point for a rope or other climbing equipment. Pitons are usually made of steel or aluminum and come in a variety of shapes and sizes. They are also known as ice screws, chocks, or nuts. Pitons are an essential part of any climber's gear and can be used to protect against falls and provide extra security when climbing.