What is the metal part of a pencil that holds the eraser called?
The ferrule is a vital component of a modern pencil. The ferrule is the metal band that attaches the pencil body with its eraser. It was originally made with brass which had the appropriate strength to hold the pencil with its eraser. Metal shortages during World War II, saw ferrules made from plastic and cardboard. It wasn’t until 1964, that J.B. Ostrowski patented the aluminum ferrule. He designed it to have two horizontal bands and lots of vertical ridges to keep the soft aluminum from disfiguring. His exact ferrule design is still used today.
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