For the most control over your fabric while piecing, most quilters prefer to use the Straight Stich Needle Plate. This foot works specifically with that plate to achieve a perfect 1/4" seam in Straight Stitch Mode. The small single hole in both the plate and the foot ensures the most control over your fabric possible and the least risk of threads or fabric getting caught in the feed dogs. NOTE: The machine must be set to use a straight stitch in center needle drop position in order for this foot to work appropriately. This foot is compatible with Janome models Horizon MC12000, Horizon MC14000, Horizon MC15000, MC8200QC, MC8200QCPSE, MC8900QCPSE, MC9900, Skyline S3, Skyline S6, Skyline S7