3M™ Cubitron™ II Hookit™ File Sheets 737U combine the highest 3M technology for automotive repair. Long-lasting triangular shaped grain and multi-hole patterns for excellent dust extraction make the sheets 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. Kiss-cut technology makes it easy to tear off abrasive in the right lengths for the job. We developed our Cubitron™ II Hookit™ File Sheets 737U for superior cut and long life during key stages in auto body repair.