This article is from the Piercing FAQ, by Anne Greenblatt with numerous contributions by others.
Screw on ball rings are an alternative to large gauge captive bead
rings. Since the ball is threaded to one end of the ring, ring
expanding pliers are not needed to remove the bead. However, the gap
between the ball and the opposite end of the ring may make this design
uncomfortable in some piercings.
 
Continue to: