1. high toughness. 2. competitive price 3. reliable in use 4. large in quantity. Changsha Xiangjia Metal Material Co., Ltd. is one subsidiary of ADTO Group. ADTO Group, established in 1998, is a leading group enterprise specializing in Scaffolding tubes & couplers, Frame Scaffoldings, Ringlock Scaffoldings, ERW Steel Pipes and other steel materials. Platform