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Magic wrench / Magic wrench

Magic wrench

Magic wrench
In the past, we need many difference size of wrench, now only one wrench is enough. Wrench head's cave shape depending on the nut shape pressure, bump pressure can make a concave hole shape. Wrench head's structure will automatically bounce the status back to before the next use.

University

National Cheng Kung University

National Cheng Kung University
Tainan, Taiwan

I JUI LEE,
National Cheng Kung University

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