This is a very handy little airtool. I use it for deburing the inside and outside of pipe, plate and almost anything, the belts are 3/8x13 and are a little hard to find but u can get them at www.mcmaster.com they have them for a good price and they are good quality. i recomend this tool to anyone who likes to make high quality parts. This also is nice for cleaning up the edge because u can push the tool down and the belt will flex around the edge and will clean and round out the edge of a plate or a nice angle for precise and easier welding without having to worry about dirt and burr on the edge. it works great on stainless too. it lets u dress the weld and helps soooooo much in prepping stainless or aluminum for polishing. i gurantee this will save u lots of time and it is 1 nice little handy tool.