1.Self-drilling anchor bolt has two performance: drilling and grouting. It features a hollow bore for flushing, or simultaneous drilling and grouting. 2.The self-drilling anchor bolt is reliable, efficient and convenient, which makes high piling output possible. 3.Sinorock corrosion protection system: A:hot-dip galvanizing corrosion protection. We can do it according to en iso1461. B:duplex coat system: duplex coat=hot-dip galvanizing+epoxy powder coating.
