This foot is used for sewing buttonholes on tight areas such as cuffs and other areas where more freedom of movement is required than available with a Sliding Buttonhole Foot. 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