ART Lockjack Sport with Swivel Carabiners - Steel Locking with a special "V shape"

with a special "V shape" ergonomic structure

Low surface friction allows textile ropes to move efficiently

double rope rope ascender

or rig it for hauling (or rescue)

Of course Pfanner focused on long-living

ART Lockjack Sport with Swivel Carabiners - Steel Locking with a special "V shape"The Lockjack was the first piece of hardware on the market that could totally replace the friction hitches used on climbing lines. Like a Mechanical Prusik, the Lockjack works as both an ascender and as a descender in the doubled rope technique (DdRT). The advantage of the Lockjack is that friction is applied to the rope with a smooth aluminum surface which causes less friction while climbing for an effortless advance, and a smoother more easily