| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that technique for a screwdriver tool with a fall-prevention mechanism capable of preventing a screw from falling is available in a conventional screwdriver tool, however, the work is hindered when a sufficient working space is not secured. Ž<P>SOLUTION: The screwdriver tool is formed into a tubular shape and a driver bit is slidable inside a body thereof (the internal shaft movable) so that stepwise adjustment of a protecting range becomes possible and any length of pins and screws can be held inside the body. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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