(The actual spinner time will be affected by age and strength of users) Metal Materials：The fidget spinner use stainless steel bearing,The body is made of aluminum metal material.Feel very good gravity,fast rotation.Finger Spinner strictly comply with US standard and CPC children's product certificate and CPSIA apprvoed No Big Noise：Fidget spinners for adults help relieve your stress and anxiety, as well as getting rid of bad habits like inattention, smoking, and nail biting. Spins Time：2-5 minute average spins times.Metal fidget spinners can helps people with ADD or ADHD to relieve stress and fit for fidgety hands. It can also be helpful for people with phone stress, autism, ADHD, attention deficit, or other attention disorders.