This seam guide change my sewing life! It works with machines that have a mounting hole on the needle plate or on the free arm.
The thumb screw will fit most machines that have holes by their stitch plate. Adjusts to fit many different seam allowances.
See #sewallthecurves on Instagram for demonstration https://www.instagram.com/p/BDLu-OZGpqO/?tagged=sewallthecurves