| 摘要 |
A tool for tightening a bolt in a very narrow place. A substantially circular plate 1 has a thickness approximately the same as the thickness of a hexagonal bolt head 3. The substantially circular plate is provided in a center thereof with a socket 5, which has a hexagonal shape corresponding to said hexagonal bolt head. The socket has a stopper portion 7 adapted to contact a top surface of the bolt head so as to prevent the bolt head from passing through the socket. The substantially circular plate is provided on a periphery thereof with engagement projections 9. The substantially circular plate is easily turned by pushing one of the engagement projections by means of a tip of a screwdriver.
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