WILL THIS PART FIT MY MODEL?
The Craftsman Series 100 Garage Door Opener (part number 57933) has a 1/2 HP motor and a chain-cable drive system.
Garage door opener 57933 includes a 5-piece sectional steel rail. It's compatible with all generations of HOMELINK. One-button remote control securely operates the garage door.
You can find the owner's manual and replacement part information on the model information page.