I was at HF this afternoon(Saturday)and I was looking at the abrasive media the sell for tumblers or vibrators. I'll be danged if I can see how in the world those pyramid shaped ¼” chunks of abrasive are gonna get inside of a ¼” , 5/16”, 3/8” or even into the threads of a ½’ NUT or into the threads of any size bolt.
DG
