HONEYSEW 161927 Snap On slant Shank Buttonhole Presser Foot For Singer Sewing Machine Low Shank Buttonhole Presser Foot 161927 - Singer fits most of domestic low shank sewing machine,the pin of presser foot is 2MM the pin of presser foot is 2MM. it will fits most of slant shank and low shank old style sewing machine fits singer 974 sewing machine use this foot with adpter 542167 and 155964