Shandong TOP Anchor Machinery Equipment Co.,Ltd was established in 2005. Our main products cover self drilling hollow grouting anchor rod system, rock button bit and so on. Self drilling anchor rod with R25, R32, R38, R51, T30, T40, T52, T73, T76 etc.Customized service and samples are available. Price competitive, quality strong and delivery fast is our main advantages. Our products are mainly used in railway, metro construction, mining, tunneling and so on.