* Head: A flat, circular or sometimes oval-shaped top that you press with your thumb to push the tack into the surface.
* Shaft: A short, cylindrical stem that connects the head to the point.
* Point: A sharp, pointed end that penetrates the surface and holds the tack in place.
Thumbtacks are often made of metal (steel, brass, or nickel-plated steel) or plastic. They are commonly available in various sizes and colors.