The Self drilling bolt System is comprised of a hollow threaded bar with an attached drill bit that performs drilling, anchoring and grouting in a single operation. The hollow bar allows air and water to freely pass through the bar during drilling to remove debris and then allow grout to be injected immediately after drilling is completed. Grout fills the hollow bar and completely covers the entire bolt.

Couplers can be used to join hollow bars and extend the bolt length while nuts and plates are used to provide the required tension. The Self drilling rock bolts are known for their excellent load capacity and are available in Normal (N) and Special (S) types with diameters from 1 to 4 in. (25 to 103 mm).
Metis supplies a wide range of capital equipment and rock bolt for the global ground engineering markets. Metis will continue its rock bolting business within underground mining through manufacturing and distribution of rock bolts. Metis will also continue to sell self drilling bolt in selected markets and applications.
Metis can handle both large quantity Self drilling bolt system orders in the hundreds of thousands for the manufacturing industry and small orders for local repair shops. We service the mining industry, tunneling, slope foundation, hydroelectric, off road equipment dealers and manufacturing companies. Our customer service area is all of Nevada, including Las Vegas, and Elko, as well as Northern California.