Kong Blocker Duck

Ultra-compact blocker for rescue, progression, positioning, and retrieval.
Designed for single ropes with a diameter between 8 and 13 mm, Duck also works with mod. Yaku Vario and Aro Sling Tubular slings.
Very small in size, it's easy to insert even with one hand.
Additionally, the large attachment hole also allows for the rotation of locking carabiners.
The Duck was born as a useful emergency blocker in recovery manoeuvres, self-rescue, progression in the cans, and as a regulator for lanyards or straps.