| 摘要 |
Provided is a self-adjustable universal ratchet spanner enabling simple and continuous tightening or releasing of various sizes of hex head bolts or nuts by repeatedly pivoting the ratchet spanner in a state in which a spanner head is engaged with hex heads of the bolts or nuts, without separation of the spanner head from the heads of the bolts or nuts. The self-adjustable universal ratchet spanner includes a spanner head having a lower jaw integrally formed with the spanner head, and an upper jaw disposed at a rear part of the spanner head and resiliently supported by a spring, wherein the upper and lower jaws are engaged with hex head bolts or nuts so that the upper jaw resiliently supported by the spring moves forward and backward depending on variable diameter between flat surfaces of the hex head bolts and vertexes upon rotation thereof to tighten or release the hex head bolts or nuts, thereby performing a ratchet function of the spanner.
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