A Valve Operator provides power to make valve turns easy. This portable and economical tool is great for preventive maintenance. Individuals working alone can isolate a leak by shutting multiple valves with this time-saving tool. In the VOK700PD the power drive uses electricity to drive the VOKCLUTCH. In the VOK700APD the power drive uses compressed air to drive the VOKCLUTCH. The clutch (VOKCLUTCH) applies up to 150 ft-lbs of torque and disengages when torque exceeds preset value. The VOKCLUTCH accepts 1” square shafts. The Valve Key extends from 4 to 9 feet and recommended operation is at chest height for best leverage.