Recently someone on one of the groups I visit mentioned purchasing one of these thread separators from Puffin Company. They had one with kitties so I bought it thinking if it didn't work at least it was cute and I could hang it someplace as a decoration. I was thrilled to find out it works so well! I've used it on regular floss, metalic, pearl cotton, silk and overdyed floss with excellent results. This is now my new favorite stitching gadget.