3M Roloc Disc 361F, P320 XF-weight, TR, 4 in, Die R400BB, 25/Carton

Fast-cutting aluminum oxide abrasive grains are bonded to the heavyweight cloth backing with durable, heat-resistant resin that supports both wet and dry applications. Backing Weight XF Weight. We used aluminum oxide abrasive, which is a popular choice among industrial professionals because of its fast cut-rate and long life.