ART Lockjack Sport with Swivel Size:11-12mm / 12-13mm which does absolutely nothing other

which does absolutely nothing other than make it look damn trick

LENGTH: 180mm

The design is compact and the unique upper sheave design is quick to open & close and secures easily

This is the newly designed Stiff Tether from Gravity Lab

ART Lockjack Sport with Swivel Size:11-12mm / 12-13mm which does absolutely nothing otherThe 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