Snap Tacks:

Two-piece snap tack consists of a male acetal tack and a female nylon button retainer. The tack has a sharp point for piercing soft materials that will not require a pre-punched hole. Easily assembled by pushing the tack through the front of the soft material and pushing the retainer to the second detent - no tools required. After assembly simply break off the pointed end and the remaining end is shielded by the retainer.

CAUTION the point is very sharp and can pierce your skin.

Can be used as an emergency button - no sewing expertise, thread, or needle required.