At Gustharts, we stock many mechanical friction devices made by ART and Petzl at different budgets to suit your needs. We have the Petzl Zigzag which allows you to move around efficiently in a tree using the prusik pulley system technique. The linked rings help with precision when moving around and the pulley is mounted on ball bearings allowing for slack.
The ART tree friction devices available are the Spiderjack 2.1, Lockjack 2 Swivel and the Spiderjack 3. The Spiderjack 2.1 is smooth even with loads and once it’s pulled above the device, it turns from its blocking position in the direction of the rope -which is useful when two hands are needed. A thumb brake helps with the control of speed. The wood is long-lasting and has friction properties so it doesn't get hot.
The ART Lockjack 2 Swivel compensates for rope twists and is suitable for 11-13 mm ropes. It’s manageable, efficient and and an easily operable device for ascent and descent in tree climbing. It is a dynamic and energy saving tool which offers keeps climbers safe.
The ART Spiderjack 3 is a multifunctional device for ascending and descending with the running double rope for left and right handers and two cams for ropes. The frame is made of high quality stainless steel. The service life is 10 years so you can trust it will last. It can be used with a second person for rescue is allowed. This self blocking rope control device has the running rope directly in front of the climber so they are able to pull and feed the rope very comfortably with one hand over hand into the device. Speed regulation is easy with the thumb brake and the smooth handle enables better speed control.