I have one of those feet. Got it at Sew and Vac store. I love it when I have a lot of straight seams to sew. It doesn't cover the ALL of the feed dogs because if it did you would have more then 1/4 in. As long as you have left side feed dogs, mine machine has two, working properly you should have no problem. Even with a regular 1/4 inch foot it won't cover both or all of the feed dogs. They are for quilting regular fabric not denim.