The safety pin is a type of normal pin that has a basic spring mechanism and a clasp. The clasp has two purposes: it forms a complete loop, properly securing the pin to whatever it is applied to, and...

The safety pin is a type of normal pin that has a basic spring mechanism and a clasp. The clasp has two purposes: it forms a complete loop, properly securing the pin to whatever it is applied to, and it protects the user from the sharp tip by covering the end of the pin..