Flat ball

A flat ball can be very convenient for many different piercings, and it also gives you a different look. 

You can wear flat balls in piercings where ordinary balls may be irritating.  For example, you can wear one as the bottom ball for the tongue piercing, where regular 3/16" (5 mm) balls can be very uncomfortable. Flat balls are more comfortable, and they fit just right.

These balls can be handy for different ear piercings as well as intimate piercings.

Apart from being very practical, these balls are known for having an unusual design. They are not so common in the piercing world; yet.