Box of 15 Trizact Ø75 P3000 discs The 3M Trizact Hookit 443SA Foam Abrasive Disc is a foam disc designed to remove and smooth out sanding scratches before using the 3M Perfect-It polishing system. Use the 3M Trizact Hookit 443SA foam abrasive disc to remove sanding scratches before using the 3M Perfect-It polishing system. Our foam disc removes scratches caused by paint grinding before polishing. *eliminates sanding scratches before polishing; *can be used in conjunction with compatible products from the colour-coded 3M Perfect-It range; *eliminates the need for wool treatment pads and reduces polishing time for increased productivity; *For wet application, without dust extraction.