Product review (4 stars): Needed modifications and better description in the listing
This set had to be modified by grinding about 1/16 inch to make more clearance on my fan and prevent rubbing. This set is shorter by about one inch than the original, and apparantly made for fans designed to be installed on low ceilings.

The instructions in the package make it clear that driling new holes in the fan blades is expected.  However, none of the advertisements mentioned this or linked to a copy of the instructions.