Manufacture DTH Drill Bits Hammer in Drilling Rod From China Yanggu Jinyou Tool Co., Ltd. Base Info Model NO.:Jygj-003Surface Treatment:PolishingManufacturing Process:StampingMaterial:Cast IronTransport Package:Wooden BoxSpecification:3 Inch to 20 InchOrigin:ChinaHS Code:8402200000 Description Pre:High Quality of Down The Hole Hammer From Xzcarbide in China Next:Manufacture DTH Hammer/Drilling Tool in Drilling Equipment From China