Cementex 50250TW38I 3/8-Inch Square Drive 50 to 250-Inch/Pound Torque Wrench 3/8-Inch square drive 50 to 250-Inch/Pounds torque wrench High voltage double insulated torque wrench is tested to 10,000-Volt and rated for use up to 1000-Volt AC and 1500-Volt DC Designed to tighten critical connections on bus bars, battery racks and power panels Audible click and feel impulse, low friction torque control mechanism, documented certification of  4-percent accuracy Two calibration adjustments and high visibility handle