3M™ Trizact™ Hookit™ Foam AbrasiveDisc is a foam disc used for removing and refining sanding scratches prior to using 3M™ Perfect-It™ Polishing System. Use 3M™ Trizact™ Hookit™ Foam Abrasive Disc to remove sand scratches before repairing car panels with 3M™ Perfect-it™ Polishing System. The foam disc refines paint rectification scratches prior to polishing.