A neighbor of mine who is into battery driven tools and vehicles, gave me some "shop gadgets" he made on his newly acquired 3D printer. The orange ones are pretty obvious, but the blue one is a real poser. He says the numbers on the blue thingy are meaningless. I am at a complete loss as to what it is and he challenged me to figure it out. Any ideas? I don't want to cave and confess I can't figure it out.
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