Although they aren't as popular as other brands, I really like my assortment of Bosch tools, until now. First there was an impact with a 1/2" drive and it was rated at a bit over 110' lbs torque. It was on sale for $99 with a battery and a charger. It struggled to get that high, I had to let it hammer away for about 5 seconds, then I read the instructions it tells you that. I returned it. Then I looked again at them and there was another model with an amazing 210' lbs torque, also for $99. So I bought that. It had darn near the same torque as the other one, 110' lbs. So I go to the instructions and noticed a ** next to the torque rating. It says you have to use a fully charged "Core 18V 12 amp hour battery. Wow, I was used to my 2 amp hour batteries and they last pretty long. Only $200 for that battery, plus a different charger for $70, and it weighs 3 lbs. So much for my lightweight impact driver. My 1/4" drive impact goes up to 85'lbs with the 2 amp hour battery. I'll return that one today. I suppose I'll stick with the pneumatic one.