Oregon 70502 are 7/32" Round Files for sharpening chain. Most commonly, 7/32" round files are used to sharpen 3/8" and .404 pitch chainsaw chain. 7/32" round files are premium files made with the finest steel using state-of-the-art production and finishing processes for best hand sharpening results on your saw chain. Oregon 70502 Round files come packaged 12 saw chain files per box.