Blank key (key and key ring)
Traditional key ring is tense and hard to use, easily harmful to fingers and nails, and also an obstacle for elders, kids and weak hands. This is a blank key (key and key ring) design, which has a key ring like handle with a special tiny gap cutting that allows other keys gathering and separating easily by through it. It may looks unsafe for possibility of ring departing in accident, but it will never happen; By the gravity the formed tiny gap cutting is naturally drooping, the keys are always connected unless deliberately artificial doing. Ring shapes are varied for all users' easily recognized, especially aid for optically challenge.