Our business line as follows: 1. DTH bits, similar or equal DHD, COP and SD series bits; 2. DTH hammers, similar or equal DHD, COP and SD series hammers; 3. Button bits, connection tapered or threaded, diameter from 33mm to 127mm; 4. Cross bits, connection tapered or threaded, diameter from 28mm to 95mm; 5. Coupling sleeves, R25, R32, R38, T38, T45, T51; 6. Self-drilling grouting bolt; 7. ODEX systeme; 8. Air leg rock drill, Hand held air leg rock drill; 9. Rotary holes tools;