Changsha DTH Drill Construction Machinery Co., Ltd. is based in China and lists products such as MISSION40 120~130mm 4inches, 8" QL80 325-350mm DTH Hammer, High Speed Eccentric Casing Systems 168, SD5 5" DTH Hammer High Air Pressure DTH Hammer, NUMA100 10" DTH Hammer High Air Pressure, and T45-89mm Thread Button Bit. The company lists these products with details including carbon steel material, button quantities, model numbers, and technical dimensions as stated in their descriptions. Buyers can send an enquiry through Global Trade Plaza.