5 pack - 3" x 21" Standard Zirconia Belts (Best for: Ferrous Metals)Best for Ferrous Metals like stainless steel and carbon steel. Can be used on other materials when needing something more aggressive. X weight poly cotton blend 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

·         Medium (Maroon) is equivalent to 120-150 grit

· J-Weight if you need flexibility for finishing

·         Course (Brown) is equivalent to 60-80 grit

·         Fine (Dark Blue) is equivalent to 180-220 grit

and copper

medium-duty tasks on flat or slightly contoured surfaces

· Y-weight polyester backing

·         Best for non-ferrous metals like: aluminum

or shaping

·         Y-weight polyester backing

· Dry applications

it can be used for cleaning