CREATE TABLE table_74301 ("For shank type" TEXT, "Singer part number" TEXT, "Uses templates?" TEXT, "Description" TEXT, "Storage case" TEXT)

What's the description of the buttonholer whose singer part number is 121795 kit 121908 buttonholer?
SELECT "Description" FROM table_74301 WHERE "Singer part number" = '121795 kit 121908 buttonholer'
SELECT "Description" FROM "table_74301" WHERE "Singer part number" = '121795 kit 121908 buttonholer'