lanyard ring

A lanyard is a cord, length of webbing, or strap that may serve any of various functions, which include a means of attachment, restraint, retrieval, and activation and deactivation.

An example of attachment is a light duty tether worn around the neck, shoulder, or wrist to carry such items as keys or identification cards.
An example of restraint is a safety lanyard used by construction workers, such as a lineman.
An example of retrieval is a nylon webbing lanyard used to raise and lower workers into confined spaces, such as storage tanks.
An example of activation is a lanyard used to fire an artillery piece or arm the fuze on a bomb leaving an aircraft.
An example of deactivation is a dead man's switch, where pulling a lanyard free will disable a dangerous device.A lanyard is also a piece of rigging used to secure or lower objects aboard a ship.

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