1/2-Inch Electric Impact Wrench Comes With 7.5 Amp Motor For Heavy Duty Applications Porter-Cable 1/2 Inch Impact Wrench Has 450 Ft-Lbs Of Torque For Installing And Removing Heavy Fasteners 2,200 ...

We called in impact wrenches and subjected them all to the same challenges to identify their strengths and weaknesses.

To run a typical 1⁄2-inch pneumatic impact wrench, an air compressor putting ... as reactionary torque—that you feel when using an electric drill is virtually eliminated.