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Snap fastener
A snap fastener, also called a snap, snap button, press button, press stud, press fastener, dome fastener, popper, tich, or tich button, is a pair of interlocking discs, made out of a metal or plastic, commonly used in place of traditional buttons to fasten clothing and for similar purposes. A circular lip under one disc fits into a groove on the top of the other, holding them fast until a certain amount of force is applied.
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