Yes, a safety pin is metal.
According to the provided reference, a safety pin is described as a small, sharp, metal fastener. This explicitly states that safety pins are made of metal.
Here's a breakdown:
- Material: Safety pins are constructed from metal.
- Purpose: They are used as fasteners.
- Design: They include a clasp to protect from the sharp point.
The fact that safety pins are made from metal is a key characteristic that enables them to function effectively as fasteners and maintain their structural integrity.