Light bulb socket for LiftMaster, Chamberlain Brand, Garage Master, and Sears door openers 1984 thru current. LiftMaster Chamberlain garage door opener chain drive models:1040, 1045, 1046, 1050, 1055, 1056, 1060, 100WD, 200WD, 300 WD, 1140, 1145, 1146,