For the most they I think are good+ with the Steel rings the small ring will fit through thr large ring If you have a tree with no croches left after storm you spike up the tallest Lead and set this Steel friction saver chocker rope into the small ring and work the tree, after spike up to and remove the Friction saver, I still use both Aul. and steel rings saves a lot of rope and good on a Pole using a Friction saver with a Pursiks keeps your rope from being around the Log if it Splis And you can just repell out Have three 3 foot steel, 4 foot Aul rings and 6 foot Aul rings