snap button

基本解释

And all of the other machinery are specially in prong snap button .
全部机械设备用于专业生产五爪扣紧固件。
Features a handle on the shoulder and a snap button that can be fastened.
以肩膀上有一个伞柄为特色，还有一个可以扣牢的按扣。
Accessories:Mainly use jeans button, snap button, rivet, eyelet, leather Disc and metal zip, etc.
配料：牛仔大多用工字钮，四合钮，撞钉，鸡眼，皮牌，金属拉链等。
blog.sina.com.cn

Basically these are textured button caps that snap onto most video game controller thumbsticks.
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