LiftMaster K75-50117 Sprocket And Chain Kit (Q057) lm-sl3000u The callbox is weatherproof and

The callbox is weatherproof and tamper resistant

restoring original mechanical performance and safety

Weather-Resistant Design: Built for outdoor durability

Anti-Jamming Protection: Features a 10-second timeout to prevent system interference from continuous signal transmission

this chain drives the limit switch assembly to maintain accurate gate position control

LiftMaster K75-50117 Sprocket And Chain Kit (Q057) lm-sl3000u The callbox is weatherproof andSprocket and Chain Kit for LiftMaster Elite Swing Gates The LiftMaster K75 50117 (Elite Q057) Sprocket and Chain Kit is a genuine replacement part designed for LiftMaster commercial swing gate operators manufactured before 2016. Also known as LiftMaster K75 50117, this kit is compatible with standard and jumbo gearbox units, ensuring smooth and reliable gate operation. Key Features Direct replacement for LiftMaster CSW200 and ROBO SWING models. Works