21+ Garage Door Opener Arm Pics. Ships from and sold by bosse_store. Innovative garage door openers, competitive prices.
For use with various liftmaster® and chamberlain® chain drive garage door openers. For use on 21 in. Curved door arm garage door opener chamberlain craftsman liftmaster 178b35.
For use with various liftmaster® and chamberlain® garage door opener rail assemblies.
Will work in other brands. Check the owner's manual or replacement parts diagram for specific part information. I think the angle is not right. The straight and curved arms are bolted together with included hex head bolts and nuts and the curved part of the opener arm is attached to the door bracket with the included clevis pin.