The ST-IW1640 is a professional 1/2″ composite air impact wrench from Sumake’s Pro Line. It has a max torque of 850 ft-lb and an ergonomic design. Sumake’s impact wrenches lead the world in ease of use, ergonomics, motor power, noise reduction, and reliability.
This model is an economical solution for professional users who need the tool to deal with general nut tightening and loosening applications such as passenger vehicle tire change or general facility maintenance.
