LiftMaster Limit Switch Shaft (Q081) | LIF-K11-50139 20-1050B-2P Master/second with a simple 3-wire

Master/second with a simple 3-wire connection

or door operators

LiftMaster Alarm Kit | LIF-K76-G0537

Capable of switching loads up to 1 Amp

Built in timer for remote exit door switch

LiftMaster Limit Switch Shaft (Q081) | LIF-K11-50139 20-1050B-2P Master/second with a simple 3-wireLiftMaster Limit Switch Shaft (Q081) LIF K11 50139 This is a replacement Limit Switch Shaft (Q081). Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. Genuine LiftMaster replacement part. Also known as LiftMaster Q081 Compatibility This part is compatible with LiftMaster HCT Overhead Gate Operators.