12 tooth cassette removal tool, made with a large enough hole in the center to pass over wires of your e-bike. (Keep in mind the walls with teeth are pretty thin, and may break if torqued too much. If this is a problem or you don't need the center hole, let me know and I can attempt to make another model for you.)
The center hole is 20.3 mm in diameter.
~1-1/8" OR 28 mm spanner wrench required if not adjustable wrench (or really strong fingers)
The author hasn't provided the model origin yet.