In construction and carpentry, a slender metal shaft, pointed at one end and flattened at the other end, used as a fastener. Most often used to join pieces of wood, nails are also used with plastic, drywall, masonry, and concrete. They are usually made of steel but can also be made of stainless steel, iron, copper, aluminum, or bronze. The pointed end is called the point, the shaft is called the shank, and the flattened part is called the head.

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