Singer Hemstitcher and Picot Edger Picoting Attachment, #121387 for use on Singer sewing machines. It comes with instruction booklet, 2 Throat plates, one is a MYSTERY Plate. This plate is #121075 which is the shape of the Class 101 plate which is 121390 and could possibly be a modification of the plate for the 101 but I am not certain. The other is 121388 for the Class 15 sewing machine . Also included is the L shaped tool # 121893, the thumb screw , instructions, and the original box in good condition.