Pfaff Embroidery/Sensormatic Free Motion Foot #6A Singer Accessories Great for linear quilting and

Great for linear quilting and deep hems on draperies

Another says

The secret to the Bernina Border Guide Foot lies in the red guide marks

Mettler Metrosene can be used for all fabric weights

Use this sole also when joining one finished edge to another or when sewing on ribbons

Pfaff Embroidery/Sensormatic Free Motion Foot #6A Singer Accessories Great for linear quilting andThe Pfaff Embroidery Sensormatic Free Motion Foot #6A is used for stippling, free motion embroidery as well as for embroidery with the embroidery unit. The foot allows for greater visibility for both stippling and free motion embroidery. Works with all Pfaff models in groups "J" and "L" that have the sensor foot lift function.