4. Bore a hole at each of these centres 3/8-inch diameter, and about an
inch deep.
5. Plane off the four corners down to the circle to produce an
octagonal form.
6. Plane off the eight corners, using as a stop a small piece of wood
fastened in the vise. Hold the roller against this stop, and allow the
stock to rest over the open space in the vise. Continue to plane off
the edges as long as they are large enough to see or feel.