Manufacture DTH Drill Bits Hammer in Drilling Tool From China Yanggu Jinyou Tool Co., Ltd. Base Info Model NO.:Jygj-006Surface Treatment:PolishingManufacturing Process:StampingMaterial:Cast IronTransport Package:Wooden BoxSpecification:3 Inch to 20 InchOrigin:ChinaHS Code:8402200000 Description Pre:SD Series High Pressure DTH Hammers for Drilling Equipment Next:Mn13cr2/Mn18cr2 Jaw Crusher Accessories Jaw Plates/Tooth Plate