Our 3M Hookit Blue Abrasive Sheet Rolls 321U delivers best-in-class performance at every stage of paint prep and body repair. Premium aluminum oxide mineral is blended with ceramic grain for a full range of automotive sanding jobs. A specially-designed multi-hole pattern captures dust, reduces loading and extends sheet life. Perforated Hookit sheets are easily sized to reduce product waste. Part of our full line of 3M Blue Abrasives, the 3M Hookit Blue Abrasive Sheet Rolls is engineered for best-in-class cut, life and efficiency across your entire shop. The sheet roll features a tough ceramic blended with premium aluminum oxide mineral that provides just the right balance. 3M Blue Abrasives deliver consistently excellent results in a minimum amount of time, on jobs ranging from aggressive paint removal and fresh filler sanding to blend preparation and sanding primer. The 3M Hookit Blue Abrasive Sheet Rolls is bonded using upgraded resins for enhanced durability. Sheet rolls are available in a wide range of grades. The sheets are perforated, which makes it easy to choose desired lengths for hand files or blocks without fold-over for reduced product waste.