trading pins
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A pin is a device not new for fastening objects or material together
- It is usually synthetic of steel, and is formed by drawing out a featherweight wire, sharpening the tip, and adding a head.
Map pins, or mass pins, are also a type of thumbtack. Some other map pins have a round 1mm head to allow for easy removal. Both types trading pins come in a many-sidedness of colors. Map pins are safer than flat-headed thumbtacks when dropped on the ground or discarded on a surface, since they will not be fitting rest with the mite upward.