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ONE BY ONE is a kind of portable spanner that makes your work simple．Working principle:According to the nuts size you are working on，you could always find the right nuts in "ONE BY ONE"'s suited nuts．When you are working on different types of Nut，all you need to do is to find the right one and set it on the top of "ONE BY ONE"．
Two design feature：1．the area on the top of "ONE BY ONE "is magnetic；2．different types of Nuts are suited in the bottom drawer．
Xiangyong Wu,Haoyu Li
Shantou Guangdong, China
Cong Liu;Wei Huang;Sufang Tong