Spiral With Circles
The Spiral Finishing strategy offers several different modes of operation. The mode is selected from the Spiral mode drop down in the Spiral Finishing parameter group:
Selecting spiral mode
The first two modes; Spiral and Spiral With Circles produce similar results, with the exception that Spiral With Circles create an extra circular pass at the Inner Radius and Outer Radius (if specified).
The last mode, Concentric Circles, produce a pattern of concentric circles which are then linked, and as thus does not actually produce a spiral but rather a circular pattern, as shown below.