| 摘要 |
A wrench includes a drive head, a drive member, a plurality of locking teeth mounted on either one of the inner wall of the drive head and the drive member, and a locking device mounted on either one of the inner wall of the drive head and the drive member. The locking device includes at least two driving blocks each formed with a locking end engageable with the locking teeth to drive the drive member. The locking ends of the at least two driving blocks are respectively engaged with the locking teeth at different time. Thus, the locking device has a smaller driving angle for driving the drive member.
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