Piping Feet Size:3/8" the Free Motion Foot is

the Free Motion Foot is used any time you want to do free-motion sewing where you control the fabric feed

same bobbin

the Brother/Baby Lock Free Motion Foot is used any time you want to do free-motion sewing where you control the fabric feed

Use the Husqvarna Viking Roller Foot with most utility and decorative stitches

Piping Feet Size:3/8" the Free Motion Foot isMake and Insert Perfect Piping, Available In Five Sizes Making and inserting piping into any sewing project is fast and easy with these piping presser feet. Available separately in five sizes, (1 8", 3 16", 1 4", 3 8", 1 2") one is just right for your garment, upholstery or home dec project. Includes instructions. Low shank foot.