the advantages of a surform rasp include a faster cutting action, no clogging of the tool with material being removed, and little or no dust.

In woodworking, surforms are used for rapidly removing wood from curved surfaces. They remove less wood than a drawknife, so they are easier to control. Even though surforms leave very coarse finishes, the worked areas can be easily smoothed with finer tools, such as files and sanding blocks. Woodworker