Ratchet Brace
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“A ratchet brace is a powerful instrument, and carries in itself the screw for obtaining the requisite pressure. Small holes can be drilled under a light pressure with rapid rotation on the part of the drill.” — Encyclopedia Britannica, 1893
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Drills and Drill BitsSource
The Encyclopedia Britannica, New Warner Edition (New York, NY: The Werner Company, 1893)
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