SMALL AIR FILE & SHARPENING BELTS - 3M STRUCTURED ABRASIVE TRIZACT
These belts are used on Dynabrade type pneumatic and electric sanders, and sharpening tools like Work Sarp. Trizact is a proprietary material that under a microscope looks like tiny pyramids line up. It is one of its best abrasives for polishing and sanding metal. 3M's grading system is as follows:
A6 (2000P), A16 (1200P), A30 (800P) A45 (400P) AND A100 ( 220P).