About anchor BarSelf-drilling Anchor bar System is comprised of thread hollow grouting anchor bar, drill bit, coupling, plate and nut. Self-drilling anchor bar system is mainly used in railway, metro construction, mining, tunneling and so on. Such stabilization of slope and foundations, tunneling

About anchor BarSelf-drilling Anchor bar System is comprised of thread hollow grouting anchor bar, drill bit, coupling, plate and nut. Self-drilling anchor bar system is mainly used in railway, metro construction, mining, tunneling and so on. Such stabilization of slope and foundations, tunneling