Here is the first attempt at rethinking the traditional split key ring, originally designed over 100 years ago. The KNOX ($19) has is improved aesthetically, with the outer 10-sided geometry, while maintaining the smooth circular inner curve. This will help keep the keys moving freely, without getting caught at the angles. The design of the ring, also allows a push-pull motion in opening the ring, rather than having to pry with your finger nails.  You can open this key rings, even while wearing gloves, and those with arthritis, will also find this key ring more convenient to use.