The term 'Scaler's Spike' is a type of climbing equipment used by rock climbers. It is also known as a PITON, which is a metal spike that is driven into a crack in the rock to provide an anchor point for a rope. Pitons are typically made of steel and come in various shapes and sizes. They are an essential part of rock climbing safety equipment and can be used to secure a climber's position while ascending or descending a rock face.