Ferrules are important for making handles stronger by preventing splitting, often on tools. The ferrule on the axe handle ensures it withstands the impact of chopping wood.
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Metal Protection
Usually made of metal, ferrules provide a durable safeguard for handles. A shiny metal ferrule encircled the base of the umbrella handle.
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Not Always Decorative
Although sometimes decorative, the primary function of a ferrule is utilitarian. I thought the ferrule was just for show, but it actually reinforces the handle.