Provides ease-of-use for tasks that could be extremely tedious if done by hand. Can be used with a 1.6 mm twin needle for narrow pin tucks. Parallel grooves on sole of foot holds concealed zipper in place at you sew. Made of high-strength metal, sturdy and durable. Fits All Low Shank Snap-On Singer* (Some Singers Require Low Shank Adaptor), Brother, Babylock, Euro-Pro, Janome, Kenmore, White, Juki, New Home, Simplicity, Necchi and Elna Sewing Machines.