Advanced Dearing Turntable Gear Linkage Manual Rotating Fingertip Top Toy Features: Gear linkage design, each gear has or more bearings. Brass gear + aluminum frame + bearings. diameter:10cm weight:145g The rotation time is 2-4 minutes longer. Double-layer structure, easy to carry, , independent and interesting, but also effective for concentration and deep thinking. Mechanical decompression . Considering the of all gears, it spins very well. How to use: Hold the turntable with hand and rotate/stop with the other hand. ADHD, increase ADHD and , improve the attention of children and adults. It is a toy very suitable for getting of irritable people. It is very suitable for arranging, meditation, timing, quitting bad habits, and bringing up conversations. It is very smooth, strong, well-made and full of. It is packed in a zippered box for protection. Very strong and well processed. Dismantling and spinning forever are fun! Product Description: Package includes: 1Gyro toy