SD Series High Pressure DTH Hammers for Drilling Equipment Yanggu Jinyou Tool Co., Ltd. Base Info Model NO.:Jygj-002Surface Treatment:PolishingManufacturing Process:StampingMaterial:Cast IronTransport Package:Wooden BoxSpecification:3 Inch to 20 InchOrigin:ChinaHS Code:8402200000 Description Pre:PF Series Cone Crusher Blow Bar Next:Manufacture DTH Drill Bits Hammer in Drilling Tool From China