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The wrench can be matched with six sides nuts with diameters of 6mm, 8mm, 10mm and 12mm, and contains most of the six sides nut on the market.Through pushing nuts to adapt to different size of nuts.You will do not have to carry all the wrench of different sizes.
Beijing Jiaotong University
BeiJing, China
Peng Shi,
Beijing Jiaotong University
ChangLong li ,
Beijing Jiaotong University
Huanzhi Lou,
Beijing Jiaotong University
Han Geng,
Beijing Jiaotong University
