The Type of Expanding-Shell Anchor Rod: 

R25 R32 R38 R51 T30 T40 T52 

Usage：

After drilling the rock or soil, remove the drill bit and install Expanding-Shell Anchor Rod. And the Expanding-Shell Anchor Rod will expand as the picture shows. Then put it into the rock or soil hole, then you can add concrete in to achieve reinforcement.

The Product Range of Hollow Grouting Hexagon Nuts: 

It is widely used in railway, tunnel for slope pre-support, mining, coast, building foundation, road reinforcement, water conservancy projects and geological faulty treatment. 

Having any questions, welcome to inquire us!