PETZL - PANTIN, Foot Ascender INTENDED USE: Designed to make rope ascents faster and less tiring. SNAG FREE: Mechanism is totally integrated into the body of the rope clamp to help prevent snagging. BUCKLE UP: Easy and quick adjustment with DoubleBack buckle. RUGGED CONSTRUCTION: Stainless steel cam has better resistance to corrosion. MATERIAL: Made from aluminum, stainless steel, and Dyneema.