Shandong Tongrui Mining Technology Co.,Ltd. founded in 2007. Our company ,as a biggest and professional manufacturer of rock bolts in our country ,can offer best quality of  rock bolts to our customers , supporting the safety of mining and protecting the miners of lives .Main products are as following : Split set bolt(Friction bolt),Cable 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.