Captive Bead Rings are rings with a ball that is held in by pressure.
Titanium ASTM F-136 High Polish
When the ring is spread apart and the bead comes out.
Tools such as ring openers and closers can help but other styles of rings are more user friendly.
PROS & CONS
This style of jewelry can be more difficult to get in and out.
Anti-tragus, Conch, Earlobes, Eyebrow, Helix (Cartilage), Lip, Navel, Rook, Septum, Tragus.