Brunner & Lay products are designed to deliver high production footage at the lowest possible cost. The extensive line includes - Striking Bars, Couplings, Carburized Drill Steel, Hi-Frequency Hardened Drill Steel, and Rok-Bits™, available with standard, conical, ballistic, or parabolic inserts. Contact us at 1-800-872-6899 or see website at www.brunnerlay.com.