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Description: Color: Dark Blue Material: 50 steel jaw, Anti-slip rubber handle What is the difference between 45steel and 50 steel? 45steel: is the carbon content of  C  0.42- 0.50 of the structural steel, the material is relatively soft, commonly used in the hardness of the mechanical parts are not demanding.  The price is cheaper. Most of the pliers use 45steel 50 steel: is the carbon content of C 0.47- 0.55 of the structural steel, the material is relatively hard, commonly used in the impact load is not required and good wear resistance of mechanical parts. The price is more expensive. [...]