Double Spool Lead-off 511113-456 for Singer High Quality Double Spool Lead-off From TFBOY Double spool lead off fits Singer models 4530, 4552, 4572, 4600, 5705, 5710, 5812, 5814, 5816, 5818, 5825, 5830, 5838, 6038, 6200, 7028, 7037, 9005, 9008, 9010, 9410, 57825, CM17, FM17, FM22 and SM14. Allows second spool of thread for double needle sewing.