| 摘要 |
This invention discloses device for a socket wrench to be firmly and fixedly combined with a motive tool, where the socket wrench is prevented from falling off from the combining during use. A pin insertion hole is formed in a blind hole with its one end as a closing portion and thus center of gravity for the pin is established toward at the closing portion far from center of the socket wrench whereby shock and excess force are absorbed in this new center of gravity, whereas the combing pin can be surely maintained at the seat avoiding from the condition in which the socket wrench and the motive tool are not separated off with firm combining.
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