The Seam guide can be attached directly to the presser foot of your choice by inserting its rod through the appropriate holes in the foot, then tightening the screw. Marked in both centimeters and inches on the ruler, the scale enables you to sew accurate parallel lines, letting you implement a host of sewing techniques without having to worry about even stitch spacing. Thanks to its simple design, the BERNINA Seam Guide with Scale is a breeze to insert and remove, whichever machine you’re using.