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It is made of carbon steel, made of No. 45 or No. 60 steel, which is processed by wire drawing, annealing, nail making, and quenching, so the texture is relatively hard. Its function is to nail to some harder objects that other nails can't nail, because the material is very different from ordinary nails, it is a special nail.
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Cement nails are very hard, thick and short, and have strong chiseling ability.
