FIRSTINFO 1/2" HDT Hydraulic Torsion Dual Torque Impact Adapter for Socket Hydraulic torsion dual torque impact adapter for socket. Use this H.D.T. socket with a 1/2" pneumatic or power impact wrench. Set up the working air pressure at 90 PSI. (6.2 bar; 6.3 kg/cm; 62 pa), and ensure the torque value of the impact wrench between 190~210 Nm. (140~155 ft/lbs) The output of the socket will be 115 Nm  6% (85 ft/lbs  6%) If require other torque value, please refer the torque chart to set up the output of the impact wrench and obtain the required torque value.