keyring

A keyring is a small ring or chain used to hold keys together. It functions as a portable, organized means to keep a set of keys in one place. In common usage, “keyring” can refer to the ring itself or the collection of keys attached to it. Keyrings are widely used in households, workplaces, and institutions.

Most keyrings rely on a split ring, a coiled metal ring that has a gap and can be threaded with keys by gradually twisting them around the circumference. Other designs include simple metal loops, dog-bone style rings, or carabiner-style clips, which enable quick attachment or removal. Keys of varying sizes and shapes can be accommodated, though larger or heavier sets may require stronger rings.

Materials include stainless steel, nickel silver, brass, aluminum, or plated steel. Stainless steel and nickel silver offer corrosion resistance and durability; decorative or inexpensive models may be made of plated base metals. Some rings feature coatings or color finishes for identification. Small rings should be handled carefully to avoid sharp ends and accidental openings.

Common variations include keychains or fobs with attached identifiers, lanyard or belt attachments, and modular systems that allow additional keys to be added without disturbing others. In security contexts, keyrings may be part of a key management system with labeled or color-coded keys; some use RFID or electronic access control keys that are separate from physical rings.

See also: keychain, key fob, locksmithing, key management.