The common key ring design, a flattened coil of metal, is rigid and requires significant force to add or remove keys, often resulting in broken nails. Flexible rings are less reliable as they deform easily with thicker keys.
The solution to the inconvenience of traditional key rings lies in a shift to a coiled wave spring design inspired by heavy-duty vehicles like those in aerospace and automotive sectors. This wave spring shape allows for easy insertion and removal of keys without nail damage.
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