Material:Q345B,35CrMo,27SiMn,16Mn For Drilling Bit; 16Mn/35CrMo For Kelly Bar; Q235 For Tremie Pipe,Alloy Steel
After-sales Service Provided:Video Technical Support,Online Support,Engineers Available To Service Machinery Overseas,Field Maintenance And Repair Service,Field Installation
Product Name:Bauer Style Kelly Bar Customer Color Blue