High Air Pressure DTH Hammer Drill Button Bit/Drilling Tool Yanggu Jinyou Tool Co., Ltd. Base Info Model NO.:Jygj-005Surface Treatment:PolishingManufacturing Process:StampingMaterial:Cast IronTransport Package:Wooden BoxSpecification:3 Inch to 20 InchOrigin:ChinaHS Code:8402200000 Description Pre:High Chrome Blow Bar for Impact Crusher Liners Next:High Air Pressure DTH Hammer/Drilling Tool From China