If your old Singer sewing machine is skipping stitches or making weird noises, these hook drive gears might need replacing. This is a set of 4 brand-new gears that fit a whole bunch of classic Singer models like the 813, 814, 818, 822, 824, 827, 833, 834, 838, 844, 860, and even the 802. The part numbers covered are 103363, 103361, 153490, and 153487. They come in original packaging and are made to fit Singer and Stylist machines perfectly. It's a common fix for vintage machine owners or repair shops. Super handy to have on hand if you're keeping an older Singer running smoothly!