Closest thing apart from what’s already suggested is part of the impact dart for a pvc film or hdpe etc dart drop test machine, however since I used one I’m Sure the dart tip was a radius not conical, dart drop is a little known test where a weighted “ dart” is dropped from a set height to ascertain the films resistance to holes being poked in it, like carrier bags, dpc’s and the like
It definately looks lab type of thingy
The removable weight bit makes me think that, but I’m having a guess to be honest
Mark