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N-Ruler is a household tool to control the nails and measure the specifically distance. There are six grooves on the ruler. They fixed the nail by the tension of metal. People use N-Ruler instead of their fingers because it is more safety and clean for unskillful home users.
Chen, ZHEN
HANGZHOU, China
Fangtian Ying
Chen, ZHEN
HANGZHOU, China
Zhen Chen
Wenwen Xin
Ying CHen