| 摘要 |
A knife comprises a handle and a blade movably attached to the handle and having a sharpened side and an unsharpened side. The sharpened side has a first sharp portion and a second sharp portion. The blade is operable to move from an engaged position to a disengaged position and to move from the disengaged position to the engaged position. When the blade is positioned in the engaged position, the first sharp portion is uncovered by the handle and the second sharp portion is covered by the handle. When the blade is positioned in the disengaged position, the first sharp portion is covered by the handle and the second sharp portion is uncovered by the handle.
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