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The 3M PSA Disc - 6 Disc Dia, 400 Grit, Aluminum Oxide is ideal for a variety of metalworking and automotive projects requiring precise sanding and finishing. With its super fine grit and flexible paper backing, this disc delivers exceptional durability and uniformity, delivering a smooth and even finish on both metal and plastic surfaces. Its 400-grit aluminum oxide material offers unparalleled scratch resistance while minimizing heat build-up for a longer disc life. The included 175 discs ensure that you have plenty on hand to complete any project, while the random orbital sanders compatibility makes it easy to attach and use with your existing equipment. With a gold disk diameter of 6, this product is designed to meet the demands of professional craftsmen and DIY enthusiasts alike.