Tooth key with steel shaft and wood handle.
Ref: “The tooth key is an instrument found in the hands of almost every body who pretends even to the lowest degree of skill in the healing art; and there is perhaps scarcely a day passing, in which teeth are not broken, and jaws splintered, and gums bruised even to sloughing, by the unskillful or awkward use of it.” N. Arnott, Elements of Physics (London, 1827), quoted in The London Medical and Physical Journal 58 (1827): 235.
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