-Replacement gear set.

-This will replace the two hook gears. . 

-Fits Singer 502, 507, 509, 513, 514, 518, 522, 527, 533, 534, 538, 543, 560, 800, 860,

-Stock numbers included-

-163997 - Hook drive gear, replaces # 103363, 163331

103361 - Hook Gear