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.bin is not a font extension i know of - it's most probably a compressed file or folder. Try decompressing it with stuffit expander or similar first and see what you get.
 
The .bin files came in an .sit file so they have already been uncompressed. The .bin files show up as Toast files but opening them in toast obviously does nothing.

These are MAC FONT files i pulled off of 1001freefonts.com Sometimes the .sit files hold the FFIL files, but most of them are .bin files.
 
The .bin files are MacBinary format (goofy for files that are already inside a stuffit wrapper, but that's what they do). Then use The Unarchiver or Stuffit Expander on the .bin files to get the fonts inside.

Or, for an easier fix, ignore the "Mac" versions of those fonts and grab the "Windows" ones. For TrueType fonts, OS X will be just as happy and you can avoid all the silly extraction steps. (Old pre-Opentype PostScript fonts get a little more complicated, but that's not what we have here.)
 
The .bin files came in an .sit file so they have already been uncompressed.
Like iMeowbot started to say, these files are basically compressed twice. You have to decompress the .sit to get the .bin and then decompress the .bin to get the actual files. The Toast association is in error (both compressed archives and images use the .bin extension, so sometimes this happens).
 
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