These abrasive sheets are the choice of professional woodworkers for sanding a wide variety of bare and unfinished goods. Manufactured from a unique Aluminum Oxide, which fractures into new, sharp edges as it wears.150 Grit Premium Woodworking Sandpaper 9" x 11" Sheet (500 Sheets), 500PK This material is an excellent substitute for garnet paper, and in most applications will outlast garnet..