I bought a bunch of singer sewing machine parts on ebay and I'm not sure what all of these weird pieces are. If you recognize any of these items, could you tell me how to use them or what they are called so I can research them?
#1. I think this is some kind of covered hem foot but I don't know how to work it.
#2. This has a little ruler on it
#3. This one is similar to 2, but with a bigger ruler.
#4. And the big kahuna--this has some kind of sharp foot, a selector where you can pick one of "star, 12, 6, 1" It is possibly a ruffler foot? What a mystery!