would like to know if they work o'k before i spend money for one. I think they sew on front and back at same time. any ideas or suggestions?

I had never heard of it until I looked it up. Warning: don't google "binding foot", you'll get gross images of human feet being bound.

Something like this, right?

http://www.newarkdress.com/mn39.html

Can't imagine that I would have enough control with a foot that is supposed to handle all those layers. Nope, I'm footlose and fancy free.

it is bias binding foot that does what i want thank u for link

I have used my regular stitch in the ditch foot for this.

I have started machine stitching the binding on charity quilts; I think I could use something like this. I will have do some checking, thank you for the info.
I love to hand stitch the binding to the back, but for charity baby quilts I will go with the machine.

Anyone use one of these?

I've never used one but they are intriguing.

I just sew the binding onto the back of the quilt and then machine stitch it on the front with a decorative or blanket stitch.
I have one of these feet, but the binding is very narrow, more for potholders and coasters IMHO.

You know I had to go Google..... it's akin to a song being stuck in my head all day.......

When I went to the big quilt show I asked about the binding foot and the lady at the booth for my machine said it wasnt good and dont buy one. She works for the company and says it dosnt work well.