MAIN PRODUCTIVE METHODS: STANDARD ROLL FORGED DRILLS ROLL FORGED, POLISHED FLUTE, GROUND LAND DRILLS DRILLS GROUND FROM SOLID FULLY MILLED DRILLS MILLED AND POLISHED FLUTE, GROUND LAND DRILLS MATERIAL:M42;M35;M7;M2(W6Mo5Cr4v2);W9Mo3Cr4V;W4mO3Cr4V) SHARPENED WITH 118 AND 135 POINT ANGLE (SPLIT POINT) STANDARD: DIN338; DIN340;DIN1897:DIN1869;ANSI B94.11M; ASME B94.11M-1993