... 4,5,6,7,8,9,... 1,Application:1,Suit for drilling medium to medium-hard formations.2,Evolute asymmetrical blade ... low torque design improve rate of penetration .4,CFD hydraulic balance design results in better bit cleaning and cutting removal ... serve cleaning,cooling and cuttings evacuation requirements with available hydraulic flows.Allows for higher flow rates with minimal increase in pump pressure ...