Reverse thinking: top of the tree rigging friction
Richard Tregoweth, Tuesday, July 12, 2016

Top of the tree friction tools are relatively new to arboriculture. David Driver of X-Rigging fame introduced the concept, and Kevin Bingham further expanded the idea with the Rig'n Wrench (DMM Pinto Rig attached to a Rope Wrench used for light rigging).
The Safebloc, marketed by SHERRILLtree, is ..