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1.Spelcial head design for different usage.2.125MM ,150mm, 175MM can be chosen.3.Different harden can be required;
4 tooth, 5 tooth.
Meterial can be use 45# steel. And also can be made of 40CrMo.
And different harden can be treat different by different requirement.
hex and round can be availible;
Chisel of air hammer