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Bump wrench / wrench

Bump wrench
Bump wrench

Bump wrench
In the past, we use wrench need many difference size, 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.

After use, inside structure will automatically bounce the status back to before use quo for the next use.Just some element unit repeatedly, can create many shape.


National Cheng Kung University

National Cheng Kung University
Tainan, Taiwan

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I Jui Lee

I Jui Lee
TAINAN, Taiwan