3M Hookit Blue Abrasive Disc Multi-hole, 36166, 5 in, 400 grade, 50 discs per carton, 4 cartons per case Our 3M Hookit Blue Abrasive Disc 321U delivers best-in-class performance at every stage of paint prep and body repair. Premium aluminum oxide mineral abrasive is blended with ceramic grain for a full range of automotive sanding applications. Our multi-hole discs feature a specially-designed pattern that reduces loading, extends disc life and aligns with most backup pads. Hookit attachment makes disc changes easy. A best-in-class abrasive for the entire repair and paint prep process
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