Innovative emergency rope clamp. Designed for single ropes with a diameter between 8 and 13 mm. Duck is the first rope clamp in the world to work even on flat and tubular webbing from 10 to 15 mm wide (although these are not approved for locomotion, as is commonly known). Extremely reduced dimensions, easy to insert even with one hand. In addition, the large opening also allows the rotation of the carabiner with screw cap. Duck is a useful emergency rope clamp for recovery operations, self-rescue, locomotion in rope shafts and as a regulator for webbing slings or daisy.