The two pieces on either side of a spinner's bearing that you hold while it spins.
What it is
Buttons, also called caps, sit in the center of a spinner and press into or thread onto the bearing. You grip them while the body spins around them.
Why it matters
Button shape, size and material affect comfort and how much contact you have. Many spinners accept swappable buttons, but fit depends on the bearing size and the maker's design.
Also known as: Caps, Spinner Caps, Bearing Caps, 按钮盖.
是什么
按钮也叫按钮盖，装在陀螺中心，压入或拧在轴承上。陀螺本体转动时，手指捏住的就是它们。
为什么重要
按钮的形状、尺寸和材质影响舒适度和接触面。很多陀螺支持换按钮，但是否合适取决于轴承尺寸和品牌设计。
又称：Caps、Spinner Caps、Bearing Caps、按钮盖。
