With this binder, the sewing machine is able to double-fold the 38-mm wide bias tape into approximately 10.5-mm wide tape to bind the material edge. When this binder is attached to the sewing machine, the operator is able to sew straight seams and curved seams as desired. If the included SA85 level plate is attached to the machine, binder can swing smoothly and damage to the main body of sewing machine can be reduced.