Split ring

Split ring may refer to the following:

Engineering

 * Split-ring resonator is a unit which enhances magnetic permeability and magnetic coupling for metamaterials.
 * Split-ring connector is a ring shaped type of timber connector that is in inserted in routed grooves between timber members in order to reduce stresses to the timbers at the connection points.
 * Commutator (electric), also called split rings.

General

 * A small keyring
 * Circle cotter, also known as a cotter ring, a formed wire fastener that is shaped like a circle, hence the name.