Handle about 40mm in diameter at the widest, threaded for a #8 screw but could be tapped differently. Made for a quick repair of a missing handle and does the job pretty well. I printed at 3 walls and 30% infill, but adjust that to however heavy duty you need the handle to be. I also used tree supports with the small end of the handle on the build plate.
The author hasn't provided the model origin yet.