Pinking Attachment, Singer (Vintage Original) screws The right edge is 1/4"

The right edge is 1/4" from the center needle position which gives you a scant 1/4" seam allowance

and worked in either threading direction

This vintage original long thumb screw is used for securely attaching the Hemstitcher or Swiss ZigZag Attachment or other Singer Attachments to the presser bar

crinkle finish while others had a shiny

Pinking Attachment, Singer (Vintage Original) screws The right edge is 1/4"This Singer Pinking Attachment that fits the Featherweight 221 or 222K as well as all low, vertical shank SINGER Sewing Machines including the Singer 15, 66, 99, 185, 192, 201, 237, 306, 319, 328, etc. Please see our video showing how one works. Each Complete Pinking Attachment Set Includes: Original Pinking Attachment with Standard Pinking Blade Standard Scallop Blade pinks 4 waves per inch. Original Spring Loaded Thumb Screw (Only w Boxed