Advanced Dearing Turntable Gear Linkage Manual Rotating Fingertip Toy description: Gear linkage design, each gear has one or more bearings. Brass gear + aluminum frame + bearings. diameter:3.4*3.4*2.2cm weight:85g The rotation is 2-4 minutes longer. Double-layer structure, easy to carry,, independent and interesting, but also effective for concentration and thinking. Mechanical decompression. Considering the of all gears, it spins very well. How to use: Hold the turntable with one hand and rotate/stop with the other hand. 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, 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! Package includes: 1Gyro toy