Since self-drilling hollow anchor bar construction is strong technical work, each working procedure must be meticulous operation,otherwise it will effect the whole piece of anchor rod construction quality because of a process of negligence .Therefore, the operator must be higher technical quality, a clear division of responsibilities. The self drilling hollow anchor bar combines drill bolt and hollow rod together and it is widely used in various engineering conditions including weak rock,loose soil,decayed rocks and unconsolidable earth mass and so on. Sinorock tries to be the most professional Self drilling hollow anchor bar system manufacturer by means of continuously researches and develops new technologies in the fierce competition.Sinorock supplies quality Self drilling hollow bar systems which are made by her manafacture base in China,who is a certified bolt factory according to ISO9001:2008 to our global clents with a competive price.
