Cambium Saver 2 x alloy rings The large diameter cross section Buckingham uses in their friction rings further minimizes friction by reducing the sharp bend in your climbing line, this in turn makes climbing a lot easier. It reduces premature wear on your climbing line, and eliminates damage to tree limbs caused by excess friction. It offers minimal friction when working from different positions in the tree, and can be wrapped around a stem for use as a false crotch where no natural crotch exists. It also aids in keeping slack out of your climbing line for added safety during your ascent. The inside diameter of the large ring has been increased to make retreival easier. The ends of the friction saver has also been colour coded for easy end identification, which also aids in retreival. All Buckingham friction savers have been load rated to 2,270kg and should be used for human support only. Compare these features to the competitors brands and see why the BUCKINGHAM FRICTION SAVER is the best choice for the professional Arborist. Different colours on each end help with ring size identification for correct removal direction.