ULTRA-LIGHTWEIGHT EMERGENCY ASCENDER: Ultra-light (35g 1.2 oz) and very compact: the ascender can be left on your harness until you need it. VERSATILE PERFORMANCE: Can be used as a rope ascender or a progress capture device in a hauling system. STAINLESS STEEL CONSTRUCTION: Stainless steel cam with angled teeth and self-cleaning slot securely grips the rope, even in muddy or icy conditions. EASY TO USE: Automatic system presses the carabiner against the rope to start the braking action on the rope in any position. Stainless steel cam with angled teeth and self-cleaning slot securely grips the rope, even in muddy or icy conditions