Our Cubitron II Hookit clean sanding abrasive discs 737U combines the highest 3M technologies for automotive 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. We developed our Cubitron II Hookit clean sanding abrasive discs 737U for superior cut and long disc life during key stages in auto body 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. The disc is ideal for feather edging, as a final sanding step before priming or during prep before blending.