The device is a real worthwhile purchase if you have more than once a year to solve bolts (also stuck) and tighten. It is robust and powerful, and less expensive than the purchase of a pneumatic wrench + compressor. A minimum disadvantage is that the torque can not be adjusted. But that may not be expected for the price. Since I do not work in the chord, does not interfere with the warming of the impact wrench with heavy use. Professionals who change throughout the day wheels on cars, that would certainly be a problem.