I'm trying to remove some of the carpet pieces in the truck (boot). A few of the fasteners are round and have a slot in the middle of 'em. I tried turning the slot to different positions while trying to pull the pieces of carpet apart. I figured sooner or later I'd hit a spot that would release the pieces. That wasn't happening, so I tried getting more aggressive and pulling on the pieces much harder. Well, that just broke the plastic thingy. So does anyone know how those plastic thingys are supposed to work?