\n\tSpecifications:\n\n\tWhen encountering the thick steel bar in the wall, there will be no embarrassment of sticking or damaging the alloy. It can easily pass through thin steel bars within 6mm (1/4 inch).\n\n\tThe alloy electric hammer drill bit is made of 40Cr steel and YG8C cemented carbide, which is durable and strong. Based on the materials, after high temperature quenching, the hardness is greatly improved. The surface treatment of the processing makes this product better in…