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Science

A Pocket Knife or Jackknife

 

A pocket knife is a folding knife with one or more blades that fit inside the handle that can still fit in a pocket. It is also known as a jackknife or jack-knife. Blades can range from 1 cm (1/2 inch) to as much as 30 cm (12 inches) in length, but a more typical blade length is 5 to 15 cm (2 to 6 inches.)

Pocket knives are versatile tools, and may be used for anything from opening an envelope, to cutting twine, to slicing an apple or even for self-defense.





 
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