| 摘要 |
PROBLEM TO BE SOLVED: To provide an auxiliary tool such as for a drill assisting to straightly bore holes, and straightly insert screws to reduce failures wherein bores are diagonally bored or screws are diagonally inserted, when a hand-held electric drill and a screwdriver are used, and capable of facilitating boring and inserting operations. SOLUTION: An auxiliary tool is mounted to a hand-held electric drill and a screwdriver, and such a device is supplied to the hand-held electric drill and the screwdriver in advance, so as to straightly bore holes, and straightly insert screws. COPYRIGHT: (C)2007,JPO&INPIT
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