Just to clarify for some folks that are not too familiar with the Sharpmaker. The standard setup comes with the Medium and Fines triangle rods. Then there is the Ultra Fine triangle rods that can be purchased seperately to refine the edge/polish the edge even more.
Their stock model # 204M = Medium rod for the Sharpmaker.
Their stock model # 204F = Fine rod for the Sharpmaker.
Their stock model # 204UF = Ultra Fine rod for the Sharpmaker.
These are what you would use for replacement rods. The 204MF is the Sharpmaker system that includes the base, medium and fine rod sets.
My setup that I have for sale contains the 204MF and a set of 204UF, which is the base, medium and fine rods plus the set of ultra fine rods!
Hope this helps.
Thx.