Made using S135 steel materials, the drill rod can be used simultaneously with a hydraulic core drilling rig. Its threaded surface has undergone special treatment, treatment (Surface hardness up to 50HRC), making it extremely wear resistant. (Thanks to a highly wear resistant surface, our drill rod works extremely well to a depth of 15,000 meters. Its mechanical property and lifespan can be respectively 1.5 times and twice higher than those of the other similar products.) The threaded connections are tightly sealed in order to withstand a pressure up to 15Mpa, ensuring there will be no leaks.