The shaft is 14-15 inches long.
The handle is about 5" long and is made from 1 1/2 inch knurled aluminum. There is a 9/16" nut welded to the shaft right next to the handle.
You can put extra torque on it with a 9/16" wrench.
There is also a hole drilled in the handle so you can use a rivet gun if the screw is stuck big time.
If this won't get the screw out you probably need to start drilling because it just isn't coming out.