i need to know what this pulley thing is in my Subaru legacy gt 1994 station wagon?

S

SarahG1

Member
go here for a pic
http://www.bebo.com/PhotoAlbumBig.jsp?MemberId=1483001515&PhotoAlbumId=9668121653&PhotoId=9827869434
and here
http://www.bebo.com/PhotoAlbumBig.jsp?PageNbr=1&MemberId=1483001515&PhotoAlbumId=9668121653&PhotoId=9827869527

i really need to know what this is and what its for i cant get a belt round it as there's a big piece of metal with 2 bolt holes in the way what are they used for as well
 
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