| 摘要 |
A socket and ratchet wrench comprises: an annular-toothed block rotatably received in a wrench body, and a socket. The annular-toothed block has a through engaging hole defined with multiple ribs each connected by a negative arc surface, the respective ribs includes two flat first engaging surfaces and one cambered second engaging surface connected the first engaging surfaces by an arc surface. At a first end of the socket are formed multiple grooves for mating with the respective ribs of the annular-toothed block, and at the second end are provided multiple planes for engaging with the second engaging surfaces of the respective ribs.
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