When you are using the Hooked dogleg gouges, you need to figure out how to twist and turn your way through the material. If you do, this tool will be very effective. The small hooked dogleg gouge is more suitable for smaller projects.
The shape of the edge is indicated by a width (in mm) and a diameter (in mm). The shape of the edge is a part of a full (imagined) circle, where the diameter is the inner dimension of this circle.