First off I rented the very same tool from my local auto parts store. No problems getting crankshaft bolt off. I used a air impact gun to remove bolt. My impact gun is a Earthquake 1/2 inch drive sold by Harbor Freight. It has 700 ft lbs. of torque at its highest setting. When replacing the cranksahaft pulley I used this tool and a 1/2 drive torque wrench with a couple long extentions placed on top of jack stand to keep extentions level. My torque wrench goes up to 150 lbs. Torqued pulley bolt to 150lbs and then I used a breaker bar to finish torquing. Hard to tell if I have exactly 181 ft lbs but, I know it won't come off.