LiftMaster Screw Drive Coupler 25C20 Chamberlain Craftsman Garage Door Opener
Replaces sprocket coupler on screw drive rail assemblies. Compatible with all Liftmaster Screw Drive and Low Profile Screw Drive operators (1995-current), models 1000SD, 2000SD, 1000SDR, 2000SDR, 2110, 2220, and models 4600, 4620, 4640, 9902, PD420, PD460