This presser foot is used to sew blind hem stitching, decorative flatlock or pintucks.
A Look at the Different Types of Sewing Machine Feet
Overlock - Serging - Accessories
Juki Blind Hem Universal Guide Foot for MO-1000, MO-2000QVP Sergers
Blind Stitch Foot (F), Singer #416437101 : Sewing Parts Online
Guide To Sewing Machine Feet
This presser foot is used for sewing the edge of fabric with a zigzag stitch while folding the fabric twice to a narrow width.
Hemming Presser Foot for Zigzag
Juki MO-654DE 2/3/4 Thread Overlock with Differential Feed and Rolled Hem - Troll Brothers Quilt Designs
Juki Serger Feet - Serger Feet and Accessories
Sewing Machine Presser Foot - Temu