Fits Singer Heavy Duty Models: 44S, 4411, 4423, 4432, 4452, 5511, 5523, HD6380, 6600C, 6800C

Also Fits Singer Sewing Machine Models:
1105, 1106, 1107, 1116, 1120, 1130, 1304 Start, 1507, 1512, 1525, 1732, 1748, 2250, 2259, 2263, 2273, 2277, 2282, 2932, 3116 Simple, 3232, 4228, 4411 Heavy Duty, 4423, 5400, 6180, 6510, 7312, 7322, 7350, 7358, 7422, 7424, 7426, 8280 155 Anniversary Edition, 85SCH