Singer slant needle type foot style...?

What does this mean? I have a Singer machine and I lost my pressor foot somehow. My grandma let me borrow a few of hers, but none of them fit! so I've been looking around online and I find some parts that say "this fits a Singer slant needle type foot style machine" is this what I need? I don't know. I looked for a place to ask questions, but didn't find any...

 

I have a Singer that has a snap-on type of presser foot, where you just remove the foot itself. My old Kenmore had ones that you had to loosen a screw and remove the whole thing to switch feet.

Does any of that sound familiar?

 

mine's the same kind where you just flip this little thing and take the foot off. it's real simple.

 

http://sewingmachine221sale.bizland.com/store/page52.html

OK, I think I get it. The slant feet are old style kind. You can buy an attachment that converts the old style feet to snap on.

Hope this helps.