Shandong Tongrui Mining Technology Co., Ltd. founded in 2007,. Split set rock bolt(Friction bolt or stabilizer), Cable bolt, Thread bar bolt, All thread rebar rock bolt, Self-drilling anchor, FRP (GRP)rock bolt, other kinds of prestressed rock bolt, the rock bolt accessories (W steel strap, butterfly plate, domed plate, star plate, coupling, drill bit, washer and so on ) and all kinds of steel.