1.Self-drilling grouting anchor 2.It embodies drilling, grouting and anchoring as a whole 3.Diameter:25-103mm 4.High strengt Self-drilling grouting anchor consists of anchor rod, steel drill bit with alloy head, anchor coupling (optional), arch plate, grouting stopper and hex nut. It has been widely used in tunneling, mining, slope stabilization, tunnel diseases treatment and roof supporting of ...