25" x 60" Polyester Backed Aluminum Oxide Belts (Best for: Wet Applications)Best for wet applications Can also be used for more aggressive sanding Y weight polyester backing Wet & 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 Weight J Weight if

· Can be used on a variety of metals when needing to remove a lot of material

· Wet & Dry applications

·         Best used for exotic metals but can be used anywhere you may need a very aggressive application

· Medium Grits (100-180): For blending

·         X-Weight for versatile

·         Can also be used on some non-ferrous metals

or shaping

· X-weight poly/cotton blend backing

o   Smoothing welds and seams

·         Standard Ceramic material is best used on hard metals

·         Can be used on a variety of materials when needing something aggressive

· Dry applications