We are the only manufacturer in Korea. It is used by a hand held drill machine and in Underground mining. Regarding Integral drill steel (called IDS), the quality of a steel material and a tungsten carbide is very important to get good drilling performance. (Tapered rod is no tungsten carbide.) So we chose high quality Swedish material and Korean tungsten carbide although the price is high. Therefore we have supplied state-owned companies in Korea, Indonesia, Yemen etc. and big mine companies over 30 countries worldwide.