I've lived in my house for 36 years now and it's never had a door knocker or doorbell. Lately I don't know if it's my hearing or the folks at the door are not knocking hard enough for me to hear them.
So over the past year or so I've been trying to come up with something unique. I finally figured it out with a 3" stainless ball and 3/8" stainless rod which I drilled and tapped for the threaded insert which came with the ball. I also had some 3/16" stainless rod which I drilled the bigger rod for in one end. I bent this into a "U" and drilled a flat plate of 1/2" aluminum to fit the uprights of the "U". I cleaned the plate and added several coats of semigloss clear. And drilled 2, 3/16"mounting holes to fit my 9 x 1.25" wood screws.
It will probably be 6 months or more before anyone uses it..........
Well at least it's there!