Knuckle Roller / Knucklebone

Knucklebone - This is a simple skill toy that is manipulated with the fingers of hands to perform tricks and patterns, or simply to pass the time.
This is a tutorial for Knuckle Roller that you can use to practice patterns and improve your skills.
This application uses the author's hand-drawn animation, due to the complexity of the execution of which the author will gradually add new tricks to this manual.