Here is a link to a picture of the main or straight cutting blade.
http://www.fantes.com/bron-central-cutting-plate-for-bron-professional-mandoline.html
Essentially, it is a piece of stainless steel plate, 4 inches wide and 3 inches tall, that they put a very sharp edge on. They do last quite a long time, but eventually become dull. The edge on the left is the cutting edge.
The reason I am interested in sharpening one is that they are expensive, $40.
They have a second or fluted culling blade as well, that’s even more of a challenge to sharpen.
See here: http://www.fantes.com/bron-fluted-cutting-plate-for-bron-professional-mandoline.html
