Presser Bar Releasing Lever and Spring, Singer Featherweight (Vintage Original) theme-spring depending on how you align

depending on how you align it to your seam

Cams are the following original sizes: 5/16" straight

Because the original spring-loaded screws (as seen in photo) are so often missing or displaced from the old Singer Pinking Attachments

221J and 222K Featherweights

you will see two examples for how this attachment was used for apparel

Presser Bar Releasing Lever and Spring, Singer Featherweight (Vintage Original) theme-spring depending on how you alignThis is the vintage original presser bar releasing lever (rocker arm) and spring for the Singer Featherweight. The purpose of this part is to release the tension discs while the presser foot is in the raised position. The screw is included (51354). {NOTE: The most common part for most Featherweights will be number 45764. However part number 45909 is the one most often on 221K, 221J and 222K Featherweights. Be sure to compare part numbers as they are