Safety pin
Most safety pins are constructed from wire made of either hardened brass or high carbon steel, which is then coated with nickel or gilt. To make a safety pin, the steel wire is plated in order to strengthen it against rust and corrosion.
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Most safety pins are constructed from wire made of either hardened brass or high carbon steel, which is then coated with nickel or gilt. To make a safety pin, the steel wire is plated in order to strengthen it against rust and corrosion.