"Harpoon"
The multipurpose knife "Harpoon" is developed as an auxiliary knife of "skeletal type".
It may be a part of survival set, (the knife is transferred in the sheath of a basic knife) or to be used independently.
A wrench, bottle-opener, a screw-driver, a can opener, a naildrawer are placed at the handle. Notch on the handle can be used as a file. The hook can be used as flayer or a jail - harpoon (when knife is tied to a staff).
Characteristics of a knife:
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Total length, mm - 186
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Length of blade, mm - 85
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The greatest width of blade, mm - 29
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Thickness of a butt, mm - 3
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Length of handle, mm - 95-130
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Width of handle, mm - 27
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Thickness of handle, mm - 3
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Hardness of blade, HRC - 52-56
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Material of blade steel - 50Cr14MoVa, 70Cr16MoVaSi (patent RU236957C1).