The Allen key is set according to the size of the opposite side of the hexagon
The model of the hexagonal wrench is made according to the size of the opposite side of the hexagon. The size of the bolt has the national standard. The hexagonal wrench produced by Wenzhou Ouhai Xianyan Shuntai Hardware Tool Factory is widely used by users in different electronic and electrical industries, sports equipment, lighting, ice skates, flashlights, etc.
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