*Set of FOUR Keys*
John Deere Original Equipment Keys Part AR51481

These fit John Deere Combine models: 1165, 3300, 4400, 4420, 6600, 6602, 6620, 6622, 7700, 7720, 7722, 8820, 9400, 9410, 9500, 9510, 9600, 9610, 9650, 9780, C240
Tractor models:1020, 1120, 1030, 1130, 1630, 1054, 1404, 1520, 1564F, 1641, 1830, 2030, 2130, 2040, 2141, 2541, 2941, 2240, 2251, 2251N, 2351, 2440, 2520, 2630, 2640, 2651, 2951, 2755, 2840, 2940, 3020, 3030, 3130, 3141, 3641, 3351, 3651, 4000, 4020, 4030, 4040, 4240, 4440, 4055, 4255, 4455, 4230, 4320, 4430, 4455, 4500, 4520, 4955, 4755, 4555, 4955, 4560, 4760, 4960, 4620, 4630, 4640, 4840, 4650, 4850, 5020, 5105, 5205, 5500, 6030, 6110B, 6403, 7520, 820, 920, 830, 930, 8430, 8440, 8640, 8450, 8650, 8560, 8760, 8960, 8570, 8770, 8870, 8970, 8630, 8850, 904, 955
Compact tractor models: 4200, 4600, 4700, 655, 755, 756, 855, 856
Riding mower models: 2243, 2653, 2653A, 2653B, 3215, 3235, 3215A, 322, 3235A, 330, 332, 3325, 3365, 7200A, 7400, 7400A, 7500A, 7700A, 8000, 8000A, 8400, 8700A, 8800A, 8900A, F912, F915, F932, F935
Harvester models: 3510, 3520, 3522, 5200, 5300, 5400, 5500, 5210, 5310, 5410, 5510, 5220, 5320, 5300, 5400, 5500, 5300N, 5400N, 5500N, 5310N, 5510N, 5320N, 5420N, 5420, 5440, 5520, 5720, 5820, 3510
Logger and Excavator models: 2154G, 2144G, 2156G, 2654G, 2656G, 3154G, 3156G, 3754G, 3754GLC,3756G, 3756GLC, 493D, 690D, 690DR, 693D
Loader models: 2254, 544G, 644G
Windrower models:2280, 2320, 2420, 2420, 3430, 3830, 489, 4895, 4990
This also fits various power units.
This is a OEM John Deere part. Thanks for looking!