Rings
A ring is a circular metal band worn on the finger that contains a spell-like ability or a psionic power (often an effect that persists as long as the ring is worn). A ring has a Defense of 13, hardness 10, 2 hit points, and a break DC of 25.
Activating a ring is an attack action and does not provoke attacks of opportunity.
Purchase DC: A ring’s purchase DC is 25 + the ring’s caster level unless noted otherwise.