This drawing, photos, and video illustrate the cutting edge of a shaper finishing tool.  For more details, see Chapter I of "Machine Shop Practice Volume II" by K. H. Moltrecht.

ShaperFinishingTool.bmp - Drawing of shaper finishing tool bit.
ShaperFinishingTool-1.jpg - Photo of tool bit.
ShaperFinishingTool-2.jpg - Another photo of tool bit.
ShaperFinishingTool.mpg - Short video of tool bit in use on a Porter-Cable metal shaper.

Enjoy,

John L.
Seattle, WA