Also known as: ポケットナイフ, ジャックナイフ
A Knife with a blade that folds into the handle. Also known as a pocketknife, jackknife, EDC knife, or penknife.
There are thousands of variations in the industry, with handle materials ranging from composite to wood to carbon fiber to titanium, and blades made from various types of steel. A typical blade length is 5 to 15 centimeters (2 to 6 in).