4 BOXES PER BOX OF 15 3M 4X Trizact P3000 150mm 6" Hookit Fine Finishing Sanding Discs 50414 Box of 15 Model No. 50414 3M Trizact 3000 150mm 6" Hookit Wet or Dry Fine Finishing Sanding Discs 50414 X4 3M™ Trizact™ Hookit™ Foam Abrasive Disc 443SA is a foam disc used for removing and refining sanding scratches prior to using 3M™ Perfect-It™ Polishing System. Can be used with an orbital machine, in wet conditions to guarantee good lubrication of the surface and avoid premature clogging. Use 3M™ Trizact Hookit to remove sand scratches before repairing car panels with 3M™ Perfect-it™ Polishing System. Our foam disc refines paint rectification scratches prior to polishing. Key Features: Refine paint rectification sand scratches prior to polishing Follow up with appropriate liquids from the 3M™ Perfect-It™ Compound or Polish Range Reduce polishing time increasing productivity Always use moist, dust extraction switched off The back of the disc allows good grip on the trays Size: 150mm