A&P (airframe & powerplant) mechanics have been using little cable rings to keep their keys and other small tools neatly organized for a long time. They are made from very strong 2mm stainless steel aviation cable with brass screws and barrels.
Available in two lengths:
WIRE A&P KEY RINGS, THEY DO SO MUCH
The A&P (airframe & power plant) Secure Key rings keep keys and small tools organized. We thought they were so cool we had to list them. They are made from stainless aviation cable with brass screws and barrels and measure 6 inch or 12 inch when not fastened. They are lightweight, strong, secure easy to open and reclose and big enough to allow your keys and tools to lay flat.
These are sold as key/tool organizers. Do not suspend yourself or others from it. Yes, it is aircraft cable with associated hardware but do not use them as replacement parts for any aircraft.
Sale is for one key ring only