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Abstract
An improved screwdriver, characterized in that it comprises a hollow grip screwdriver at the end of which, opposite the blade, a threaded plug is disposed, on the inside of which is integral with it a rod with a plurality of circular recesses, forming a multiple spool and in each one of them can be a kind of thread of the appropriate sections for electrical use serving, the widening thereof as separators between the reels in which the nature of the thread contained therein can be noted. (Machine-translation by Google Translate, not legally binding)