Great for fidget, anxiety, focus, ADHD, autism, quitting bad habits. you can grab the fidget spinner and play , not nail biting. Many have successfully curbed unwanted habits using the funny cool fidget toy. HIGH SPEED HYBRID CERAMIC BALL in the center to ensure the smoothest rotation and consistency. 3 STEEL 608 COUNTERWEIGHT BEARING WEIGHTS to increase centripetal force and time. BEARINGS ARE REMOVABLE for future upgrades. Spinner the adhd fidget toys simply hold with one finger either side of the centre and then with your other hand spinner. With practice the spinners can be used with one hand only. To use the anxiety toys on a table simply press the centre to keep it stable and at the same time rotating. The fidget toys will continue to spinner once you let go.