DCHP-2
crooked knife 
Known also by the French-Canadian name couteau croche, this tool was an important article of trading goods, although it was often homemade from old files or trap springs. DCHP-1 (pre-1967)
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n.
a wood-working knife usually having a crooked handle and, often, a hook at one end of the blade, used widely in the north, especially by the Indians, for making snowshoes, fur stretchers, canoes, and all woodwork.
