These 100% flexible cotton backed AO belts are a good tool for sanding of both metal and wood. They are suitable for both ferrous and non-ferrous metal. It's also suitable for sanding both hardwood and softwood.
 
 
Belt backing is 100% cotton J-flex
Sold In Packs of 5 and 10 belts
Available in grit P120, 220, 320, 400, 600, 800