We are 3H Rock Drill Tools Factory from China,are specialized in manufacturing Rock Drill Bits. Since 1954. Generations of managers and employees, with their painstaking efforts,wisdoms and hard work, have made the Works a professional factory.  In 1996, we have achieved Quality System Certificate ISO9001.  We own a national level technical center, analysis and measuring center and post graduates scientific research work station.   With cheaper labor force, low cost, long histry of  technology, we are striving to serve our clients with high quality and more favorable price.   Our products are sold in Brasil, North America, Europe, etc, are used in Mining,Quarrying, Tunnelling ,Road planning & trenching.   Sincerely hope to establish long-term cooperation with you.