This unique fixture is a zero-gravity tool arm supporting an angle grinder.
Offering 360 degrees of movement on all three axes, it allows a worker to grind tall or overhead surfaces, all day, without actually needing to lift the tool.
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It was designed and built by Missouri-based Ergonomic Partners, a company that manufactures custom material-handling solutions. Their inventions allow one person to lift, move and precisely manipulate large, heavy and unwieldy objects. Some examples: