the AO2 knucklebone
Aroundsquare’s Knucklebone is the original hardbody knuckle roller. It is a skill toy that is manipulated with the fingers to perform tricks and patterns, or simply to pass the time. It is very discrete (unless dropped) and can be played in restricted spaces. The kbone makes a great EDC item, and serves well as a worry stone. But don’t be deceived. In the right hands, this toy is capable of complex technical tricks that can entertain for hours.