Metal fidget spinners can helps people with ADD or ADHD to relieve stress and fit for fidgety hands.(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 with high quality,feel very good gravity,fast rotation. 【Spins Time】3-8 minute average spins times. 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.