| 主权项 |
1. A wrench, comprising
a first member having a first jaw, the first jaw having at least one first nut member contacting edge; a second member having a second jaw, the second jaw having at least one second nut member contacting edge; a pivot axis at which the first and second members are pivotably coupled to each other, thereby allowing the first and second jaws to be movable between an open position and a closed position; at least one opening defined by the at least one first nut member contacting edge and the at least one second nut member contacting edge, when the first and second jaws are positioned in the closed positions, the at least one opening having a central axis extending through a geometric center of the at least one opening and perpendicular to a plane in which the at least one opening lies, wherein the first and second jaws move away from the central axis when the first and second jaws are moving toward the open position, and the first and second jaws move toward the central axis when the first and second jaws are moving toward the closed position. |
