Place the Button Shank Plate under the back of the presser foot, abutting the seam, to lift the back of the presser foot, keeping it horizontal allowing for an even, continuous feed without any skipped stitches over humps such as: a zipper at the bodice, belt loops, pants hems, drapery and craft projects, etc. Use with: Continental M7, MC10000, MC10001, MC11000, MC11000SE, MC14000, MC15000 Horizon, MC15000V3, MC6700P, MC9000, MC9400QCP, MC9450QCP, MC9900 Horizon, Skyline S7, Skyline S9