Durable Material -- All-metal construction, the metal fidget spinner features an R188 high-speed bearing in the center to ensure optimal spin and consistency, as well as increase centripetal force and spin time. So these metal ADHD anxiety toys can rotate at least 3 minutes. ROUND SIDE AND SMOOTH SURFACE -- Protect your fingers from scratching. NO REPAIR, OIL OR MAINTENANCE NEEDED: Use the toys to relieve stress right out of the box. They also offer very little slowdown during tricks. Easy to Use Figet Toys-- To spin the ADHD Figets shaped toys, simply hold them with one finger on either side of the center, then rotate them with the other hand. With practice, fidget spinners can be used with one hand. Anti-Stress Toys--With a fidget spinner, you can kick unwanted habits like nail biting or smoking. Your boring time will pass quickly and you will have a great time when you are alone. Instead of fidgeting with your fingernails, you can just pick up the fidget spinner and play with it. Many people have successfully kicked unwanted habits using this fun and cool toy.