What Do You Call The Type

[cst]

Of snap that has a stud that snaps into a grommet? My google-fu is evidently no match for this problem. Most of the ones I've seen look to be copper and were seen on wallets. I'll look for a picture

Thanks

[Chain]

Sam Brown Stud?

[camano ridge]

You might be trying to describe lift the dot fastner as pictured below.