Hexagonal wrench used for treating chamfering screw

The invention relates to a hex wrench dealing inverted screw, particularly a hex wrench with simple structure and high clamping stability, with one sleeve barrel end inserted into a matching shaft whose edge side forming into a semi circular cross section containing arc slot with a pair of clamps sh...

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1. Verfasser: XIYONG LI
Format: Patent
Sprache:eng
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