Bi-Level Spring Action Guide Foot. This high quality presser foot is equipped with a guide that provides a perfect topstitching and edge stitching. These feet are called bi-level spring action because the edge guide is spring loaded to compensate for different thicknesses of fabric or topstitching over a seam allowance. It can be used wherever precise topstitching is desired. Available in following sizes. Size 2.0mm Size 5.0mm Size 8.0mm Compatible with Babylock models : BL500A Jane, BL510A Jane, BL520B Accomplish, Quilter's Choice Pro BLQP Compatible with Brother models : Nouvelle PQ1500S, PQ1300, PQ1500 Compatible with Husqvarna Viking models : Mega Quilter 1200 Compatible with Janome models : 1600P-QC Compatible with Juki models : TL-98Q, TL-2000Qi, TL-2010Q