LOCK JACK 2 The ART Lock Jack is manageable, efficient and easily operable device for ascent and descent in tree climbing. The Lock Jack offers every climber, beginner or pro, a safe, dynamic and energy saving climbing experience. Equipped with the ART Swivel the Lock Jack compensates twists of rope and body alike and thus raises the climbing comfort considerably. KEY FEATURES Patented Multi-functional ascent and repelling device for the running double rope Approved for descent with 2 persons Certified to EN 358 For textile ropes EN 1891from 11 - 13mm Device can be installed on the climbing line without any threading Body and parts are made of aluminum machined in the solid All worn parts can be replaced Service life: 5 years Tested with: 15kN/ 3 min Breaking strength: 25kN Weight: 310g