- Very small size
- It is easy to insert even with one hand.
- The wide hitch hole allows rotation of the lock carabiners.
- It is intended as an emergency blocker useful in recovery maneuvers
- For self-rescue, progression and as a regulator for tie down or daisy chain.
Innovative Emergency Blocker Designed for single ropes with a diameter of between 8 and 13 mm, the Duck is the world's first blocker capable of working even with flat and tubular tapes from 10 to 15 mm wide (although these are known - not approved for progression).