FRISTER + ROSSMANN Buttonhole Guides Set
Set of 5 buttonhole guides as supplied with various Frister + Rossmann models, including the Cubs.
They are a brilliantly simple idea and will actually work with any machine that has a 4-step automatic buttonhole function, provided that the machine's zigzag foot will fit inside them.
Each guide is for a different size buttonhole and it is placed under the standard zigzag foot. It is then used to guage the size of the buttonhole. The instructions are in the Frister instruction manuals.