Also called a rat-tail file, round files are gradually tapered. Designed for filing concave surfaces having a smaller radius than a half round file and also for enlarging round holes, making a corner radius and creating a scalloped edge. Made in China.

For jobs that do not require the accuracy of Swiss Pattern Precision Files, American Pattern Files will provide the best results. Lengths given are length of cut only, exclusive of tangs.

The cut of the file refers to how fine its teeth are. They are defined as, from roughest to smoothest: bastard, second, and smooth.