Specification: 17mm & 19mm & 21mm
Material: 45# & Q235
Heat treatment: Carburization & Quenched & Tuna
Quality: HRc38-42
Surface treatment: Electrophoresis & Galvanization .
The wrench spanner can apply for kinds of car. and work part of the wrench is finished by hot forging, which have high strength and very durable.
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