Correct option is D
A half-round file is specifically designed for finishing and smoothing circular holes or curved surfaces. It has one flat side and one rounded side, making it ideal for working on concave or circular surfaces.

Which tool is used for finishing a circular hole?
A half-round file is specifically designed for finishing and smoothing circular holes or curved surfaces. It has one flat side and one rounded side, making it ideal for working on concave or circular surfaces.
