5 pack - 3" x 21" Super Flexible Backed Aluminum Oxide Belts (Best for: Contour)Best for difficult curved contoured applications on a variety of metals Can be used for finishing and polishing stainless steel J weight poly cotton blend backing Dry applications For a cheaper alternative see our Flexible belts 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

· Wet & Dry applications

Choosing a Backing Weight

· Y-Weight for tough grinding and heavy material removal on hard metals and flat surfaces

·         Y-weight poly/cotton blend backing

plastics & composites

o   Initial blending of welds or seams

and copper

What Backing Weight Should I Use

· For a more premium alternative see our “Premium Flexible” belts

·         Can also be used on some non-ferrous metals

·         Can be used on other materials when needing something more aggressive

·         Our premium ceramic material has an 80% ceramic/20% alumina blend with grinding aid