52" x 103" Economy Aluminum Oxide Belts (Best for: Wood)Best for wood sanding Can also be used as a cheaper option for general metal sanding X weight poly cotton blend backing Dry applications Choosing a Grit Coarse Grits (24 80): For heavy material removal, weld grinding, or shaping. Medium Grits (100 180): For blending, deburring, and intermediate smoothing. Fine Grits (240 400): For finishing or preparing for polishing. Super Fine (800 1200): For mirror polishing or fine detailing. Choosing a Backing