Baby Lock Hemmer Foot 4mm Fits Groups A B D G H I. Create a couture hem finish using the 4mm Hemmer foot. With the fabric positioned in the coil guide, the fabric edge is rolled to the inside and the hem is secured with the selected stitch (i.e., straight stitch). The end look is a perfectly even rolled hem. The 4mm Hemmer foot was designed for use with light to medium-weight fabrics. Looking for a slightly wider hem finish, the 6mm Hemmer foot is the perfect solution. Note: Group I will require BLQP-MB (Master Shank)