In the guise of a feather, this tool is useful for more than just calligraphy. Cut in a triangle shape, it can be useful for various workshops; scrapbooking, linoleum work, scratch cards or for cutting paper.

For the record, this little "vaccinotyle" tool was in fact used in the past as a small blade to vaccinate, through a scratch, the vaccine was slipped under the skin. This practice is obviously no longer in use.