Mac Bin Extractor for Windows?

Hello Guys!
Do you know any Mac bin extractor for Windows? I have a Macintosh binary file with .Bin file extension that needs to be extracted. When I try to double click the file, it shows a .Sitx and .Sit files. Do you know what are these files and how to use them? Do I need to use extra utilities in order to open these files? Anyone please help. Your help is much appreciated. Thanks in advance.
