This foot can be set to sew on each side of the zipper by adjusting the position of the foot and tightening the thumb screw. Also great for sewing close to piping. Use with: Continental M7, Horizon MC12000, Horizon MC14000, Horizon MC15000, MC15000V3, MC6650, MC6700P, MC8200QC, MC8200QCPSE, MC8900 Horizon, MC8900QCP Horizon, MC8900QCPSE, MC9400QCP, MC9450QCP, Horizon MC9900, Skyline S3, Skyline S5, Skyline S6, Skyline S7, Skyline S9