Petzl Tandem Rope Pulley Harnesses 5L and 3L size for

5L and 3L size for smaller tools (measuring tape

May be used with a CAPTIV positioning bar to favour loading of the carabiner along the major axis

with the benefit of friction

Knots At Work - A Field Guide For The Modern Arborist

From attaching blocks and pulleys around the tree

Petzl Tandem Rope Pulley Harnesses 5L and 3L size forDouble pulley designed for Tyrolean traverses, zip lines and flying fox on a rope (not cable), the TANDEM has aluminum sheaves mounted on self lubricating bushings for efficiency. It accepts up to three carabiners. Rope compatibility: diameter: 13 mm or less Sheave diameter: 21 mm Ball bearings: no Efficiency: 71 % Maximum working load: 10 kN Weight: 195 g Certification(s): CE EN 12278