Vintage Singer slant shank multi slotted binder foot. This version has the elongated needle hole which makes it compatible with zigzag machines such as the 401 / 401A, 403 / 403A, 411G, 431G, 500 / 500A, 503 / 503A Rocketeer, etc. Good vintage condition, clean & rust free. Original, genuine Simanco accessory, part #161174 or 161420