... 4,5,6,7,8,9,... 1,Application:1,Suit for drilling medium to medium-hard formations.2,Evolute asymmetrical blade ... cooling and cuttings evacuation requirements with available hydraulic flows.Allows for higher flow rates with minimal increase in pump pressure. ... Model118,152,215.9,244,311,445Typeall kinds and size PDC bitsApplicablewater well, oil field, construction, geothermal, directional boring, and ...