Gives a perfect ¼” seam allowance, the edge guide is ideal for accurate piecing.Please note the category D version is supplied un-packaged Genuine Janome presser feet for the best results on your machine Demo Video Fitting information :Category B models have a top load bobbin and include:725s, 203DC, 306DC, M50, M100, M200, 4300, 740, 780, HD2200 521, 525S, 2522LE, 4023, 5024, 6019QC, 6260, 7025, CXL301, DC3050,DC4030, DC4100, DKS30, DKS100, DXL603, JEM GOLD, JEM PLATINUM, MC-4800, MC-4900, MC-5900, MC-6500P, MY STYLE 22, QXL605, TXL607, XL601, XC33 Category C models, top load high shank:Atelier 3, Memory Craft 11000, MC1001, MC10000,MC9700, MC95000, MC9000, MC7700QCP, MC6600P Category D models, top load 9mm stitch width:Atelier 5, Atelier 7, Atelier 9Memory Craft 8200, 8900, 9400, 9900Memory Craft 12000, 14000, 15000