| 摘要 |
A utility knife and a method of using a utility knife. The utility knife including a first blade coupled to a linkage and movably positioned within the housing between a first blade fully-retracted position wherein all of the first blade is positioned within the housing and a first blade extended position wherein a portion of the first blade extends outside the housing, and a second blade coupled to the linkage and movably positioned within the housing between a second blade fully-retracted position wherein all of the second blade is positioned within the housing and a second blade extended position wherein a portion of the second blade extends outside the housing. Additionally, the linkage being movable between a first position in which the linkage locks the first blade in the fully-retracted position while permitting the second blade to move to the extended position and a second position in which the linkage locks the second blade in the fully-retracted position while permitting the first blade to move to the extended position.
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