Pitons are metal spikes used in rock climbing to secure ropes and provide safety for climbers. They are typically driven into cracks or holes in the rock and can be used to create anchor points. Pitons come in various shapes and sizes, designed for different types of rock and climbing conditions. Climbers often use pitons in conjunction with other gear, such as carabiners and climbing ropes, to ensure a secure ascent. While they were once a primary tool for climbers, modern techniques and equipment, like cams and nuts, have reduced their use in favor of less invasive options.