General description This set of 4 hook drive gears is an essential replacement for various Singer sewing machines. It includes the 174491 large feed shaft gear, 174488 long feed drive gear, 163997 hook drive gear, and 163328 hook gear, all made from high-quality, durable plastic. Technical specifications Includes: 174491 large feed shaft gear Includes: 174488 long feed drive gear Includes: 163997 hook drive gear Includes: 163328 hook gear Compatibility and accessories Compatible with Singer models: 630E, 635, 636, 638, 639, 640E, 646, 648, 649, 714, 717, 778, 834, 900-3, 920-3, 925, 935U, 1036, 1200, 2000, 2001, 2005, 6704, 6705 174488 long feed drive gear can replace models: 153490, 313920, 422408 174491 large feed shaft gear can replace models: 177491, 422325 Additional compatible models: 1030, 1036, 1425, 1482, 1485, 1486, 1488, 1490, 1492, 2000, 2001, 2005, 2010, 2110, 2112, 2102, 2105, 2106, 2108, 2210, 2302, 2303, 2304, 2315, 2330, 2404, 2430, 2502, 2503, 2504, 2515, 2530, 2623,