What kind of Fastener is this? Answered

As usual I've been taking apart things and I've noticed an unusual fastener, it looks like a rivet but its melted plastic. I was just wondering how it works (i.e. how they melt it, special equipment or diy?). My xbox had one on it and I've noticed a couple of other electronics that have them as well. Googling plastic rivet didn't give me anything close. I do a lot of repairs so adding a new fastener to my list would give me more options for making a repair / mod look more professional. I took a pic of it below.