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.
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.