2) Main Key for ALL Doorking Gate Openers made after 1997 to present Doorking 4001-035 Lock N16058BDxSFx2K Key 16120 For Keypad,Telephone entry system,sliding gate opener, swing gate openers, All Doorking Brand Products OP-KEY Will Work on Model # 6050 - 6100 - 6300 - 9050 - 9100 - 9150 - 9310- all 9200 series - 1601-080 - All 1812 series - 1810 - 1803 -1808 - 1802 - 1833 - 1834 - 1837 - All Keypad 1803 - 1806