The file 'Garage Door Shaft Coupler For Craftsmen/LiftMaster/Chamberlain Garage Door. 3D Printer Model' is (stl) file type, size is 11.1KB.
Essentially a 3D printed version of this. Mine shredded itself apart and I didn't want to wait for a new one. Printed over the course of about 6 hours with 100% infill.
Garage_Door_Shaft_Coupler.stl | 66.5KB |