It is normal for the gyro to make a sound when it rotates. It is recommended that you place it on a horizontal surface or rotate it vertically. Try to avoid tilting it when you place it on your hand. It is normal for it to shake slightly when your hand is unstable. Please do not wash it with water, because the rotating ball in the bearing will have resistance when it touches water, affecting the rotation speed.
This gyro is processed by CNC precision machine tools with more than ten processes.It is made of imported 420 steel and the surface is anodized, which will never fade.
Product size: 6.4*2.4*1.6cm
Rotation system: imported bearing
Material: all 420 steel

Color: black, gray, red, please specify when placing an order.