Thr purpose of the package is to provide an alternative interface to the CM Sans Serif boldface fonts. The EC (T1, Cork) encoded versions of the ‘CM Sans Serif boldface extended’ fonts differ considerably from the traditionally (OT1) encoded ones: at large sizes, >10pt, they have thinner strokes and are much wider. At 25pt they are hardly to be recognized as being ‘boldface’. This package attempts to make these T1 fonts look like the traditional ones did. You do not need any new fonts; the package just changes the way LaTeX makes use of the current ones.