I just recieved some of those 999 black Nortons, One 36 & one 24. I was just able to run the 36 g for a few minutes before I shut down for the holiday. I do like the super heavy backing and they seem to look like a lesser grit belt. They cut well, I I need to see how long the last etc...More later in the week.
I received them from Scott at trugrit.com as a test to see if he will carry them? Tell us more of your findings on these new Norton belts?