| 摘要 |
The present invention relates to a ratchet wheel of a wrench, which has an opening that penetrates the first and second ends. The opening has twelve identical first recesses that are disposed around the inner periphery of the opening about the central axis, wherein one longitudinal end of the six equidistant first recesses has a stopper portion, said end of the first recess is blocked by the stopper portion. Each of the stopper portions has an identical second recess on the side toward the central axis of the opening. Each of the first recesses comprises two corresponding first angulated portions, wherein the angulated portions of every six equidistant first recesses form a first hexahedral area. Each of the second recesses comprises two corresponding second angulated portions, and the angulated portions of the second recesses form a second hexahedral area. The efficiency of capable of accommodating two different sizes workpieces and restricting the passage of a workpiece through the ratchet wheel are achieved.
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