Leather rope and cambium Saver is a dependable and easy way to protect your climbing rope and tree bark from damage leather is formed, sewn and riveted into a tube shape that's easy to feed the rope through. effective device is durable, lightweight and easy to use. easy to install and remove - simply pull end of rope to bring device down from tree. we suggest keeping this device installed on rope so it's ready every time the rope is used. applying talcum powder inside the channel helps reduce friction. accommodates lines 1/2" to 9/16" or 11 mm wide.