I have them for my Kenmore but not my Viking. I know they make them but they are different than most so you have to make sure you get the ones made for Viking. It's just like the sidewinder; it doesn't work for Viking because it winds them in a different direction that what Viking does. I've heard there is a sidewinder that will do Viking but don't know the cost. I just wind a ton of bobbins, rather I'm doing quilting or embroidery.