have been specifically designed for use in Hard Rock drilling applications where formation conditions are generally consolidated and fine grained with high compressive strengths and Mohs hardness values in the 6 to 8 range. Traditionally, it has been necessary to apply higher bit loads when drilling under these conditions in order to achieve acceptable rates of penetration – usually at the expense of overall bit life and premature wear on drill string components

a. certification: ISO9001:2008
b. having sufficient experience of explorting to 30 countries all over the world, and our items haved obtained our clients approval
c. lower your drilling cost and have speedy delivery