Replacement Hook Driver Gear Compatible with Riccar Home Sewing Machines. Part Number # : 53741 Compatible with Riccar models : 414, 500, 505, 515, 525, 555FA, 570, 572, 600, 606, 610, 616, 666FA, 805, 806, 807, 808, 808E, 888, 906E, 2600, 2800, 2900, 2950, 3300, 3400, 3500, 3600, 4001, 4003, 8400, 8500, 9150, 9160, 9600, 9700, 9800, 9900, R750, RE571, RE581, RE591, RM570Group 6 models : Platinum 955 E, 950 E, Platinum Plus, Platinum 770, 775, Platinum 750 Quilt, And more