1/2" (0.5) NPT threaded plug mandrel

This is a remix that I made into a mandrel that can be attached to a drill, it's designed to have a 5/16" bolt inserted into it with a washer/nut that allows attachment to a drill... I wanted a way to more easily sping an item I made out of 1/2" PVC pipe so that I could wet sand and polish it more easily...