Vintage Singer sewing machine feed dog cover plate for darning, embroidery & free motion sewing. It is for the model 101, but it is also compatible with the 115, 15 & 201. It is held securely in place by the slide plate and only takes seconds to put in place. Very good vintage condition with typical signs of age, may have minor tarnish similar to the example shown. Genuine, original Simanco accessory, part #66628