Janome My Lock Serger Elastic Gathering Attachment The Elastic Gathering Attachment allows easy attachment of elastic tape for waists and cuffs which is especially useful for making undergarments and childrens clothing. Elastic Gathering Attachment for use with models AT2000D,103, 1110DX, 134D, 203, 204D, 234, 234D, 303, 304D, 334, 334D, 3434D, 434D, 504D, 534D, 6234XL, 634D, 644D, 7034D Magnolia, 734D, 744D, 7933 Harmony, 8002D, 9102D, 9200D