Bernina #70 (Run and Fell) Lap-seam foot
Lap-seam foot #70 enables you to sew precise lapped and flat-felled seams up to 4mm in light and medium weight fabrics.The square toe on the right of the presser foot acts as a guide for turned-under fabric edges on sportswear, jeans, and men's shirts. The #71 foot is also available for 8mm seams.