This type of screwdriver is the kind that was originally included with the box of attachments for each Singer Sewing Machine, including the Singer Featherweight 221 & 222K. Useful because the head of the screwdriver accommodates most all of the larger screwheads on your vintage Singer Sewing Machine. Vintage original stock is limited to what we have available on hand and will vary from week to week. Some styles will be the narrow teardrop, whereas others will be the more rounded teardrop (see photos above), but they are most assuredly vintage original Singer parts.
We have them available in either the chromium or blackside finish.
The small screwdriver and attachments are sold separately.