Body Jewelry is classified by shape.
Back to How to open Captive Bead Rings

Technically these are not "Captive" Bead Rings
They are Fixed Bead Rings and/or Seamless Rings

If the ring is "Annealed" (a softening process) it can be opened without tools.  It is pushed open sideways. In this case the left hand twists back and the right hand twists forward. Or with tools