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Norton® NorZon Plus™ TS Speed-Lok® R821 36 Grit TS Type II Abrasive Zirconia Alumina Cloth Disc measuring 4" Dia is a perfect choice for grinding and deburring stainless steel. Abrasive type cloth disc is applicable in weld blending and deburring, light deburring and finishing and heavy metal removal. Disc offers reduced edge-wear, cooler cut for longer life span and extended durability. Disc locks securely to back-up pad, but can easily be removed while quick, tool-free disc changes allow for more grinding time. It features heavy Y-weight backing, two-ply construction, self-sharpening and twist on and twist off in 2 1/2 turns. It is sold as 25 per pack.