integral drill steel is the Hex 22*108mm at the end ,the other end is 32mm-42mm diameter chisel bit , the body of the drill rod we use the 45SiMnCrNiMo to make sure the better quality , the chisel bit we use best tungsten carbide Yk05 The whole performance is better than others , the length we have 0.5m-6m , we can produce it according to the requirement of the customer ,if you have other technical questions please add my wechat or whatsapp to contact me , we are waiting for your news
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