KAM-style plastic press-studs and their setting tool.

I wanted to replace the worn-out velcro fastener on the pocket I keep my phone in, and initially I intended to use a metal press-stud. But unfortunately I didn't have matching studs and setting tools, and when I looked on ebay there were so many incompatible types that I decided to try a newer plastic version instead.
Part of that was just to see how well the plastic pin crimping worked, since it seems odd to see a plastic fastener that relies on deformation of a plastic pin like a rivet.
I got a set with a large number of snaps included and so far they actually seem quite good. the rivet actually spreads very consistently and evenly without folding or snapping.
The tool is interesting in the way it provides pressure in an absolutely linear sliding punch.