This metal foot is marked both in front of and behind center needle position with 1/4" and 1/8" marks. Your perfect reference point for pivoting, stopping, and starting is right on the foot. Use right edge of foot for piecing scant 1/4" seams; left edge is just right for 1/8" narrow seams in doll clothes, miniature quilts, and crafts. Handy detachable quilt guide helps keep rows of stitching even and straight. Guide bar adjusts for quilt channels 1/2" to 3" apart.