Got a couple boxes cheap, for sanding drywall. Still have to use painters' tape all around the edges and smoke at least part of a cig. before sanding. Note even if you don't smoke the cig. will cause your lungs to get a mucus lining and you cough up more of the crap. I am one of those that believe that smoking in moderation is actually good for you. After all who said it was bad. Almost all of autopsies for lung cancer find asbestos, this is from a woman that worked in a morg for 40 yrs.