Manufacture DTH Button Bit/DTH Hammer in Drilling Equipment From China Yanggu Jinyou Tool Co., Ltd. Base Info Model NO.:good qualitySurface Treatment:PolishingManufacturing Process:StampingMaterial:Cast IronTransport Package:Wooden BoxSpecification:3 Inch to 20 InchOrigin:ChinaHS Code:8402200000 Description Pre:Mn13cr2/Mn18cr2 Jaw Crusher Accessories Jaw Plates/Tooth Plate Next:High Air Pressure DTH Hammer Drilling Tool From China