3M CUBITRON II 6″ HOOKIT CLEAN SANDING ABRASIVE DISCS – 3M Cubitron™ II Hookit™ Clean Sanding Abrasive Discs 737U combines the highest 3M technologies for automotive / marine repair. Its long-lasting sharp triangular shaped grain and multi-hole pattern for superior dust extraction make the disc ideal for paint removal, rough body filler shaping, fine feather-edging or final prep before blending or priming. The Hookit™ system makes for quick disc change-outs. 3M developed their Cubitron™ II Hookit™ Clean Sanding Abrasive Discs 737U for superior cut and long disc life during key stages in auto body and marine repair. It features 3M™ Precision-Shaped Grain technology. This triangular shaped grain cuts at least 30% faster and lasts at least 30% longer than traditional ceramic abrasives. Product is sold by the box.