j.. u sure u arent thinking of an impact wrench? u need an air compressor for that and they are a big more expensive.... a torque wrench looks just like a socket but the bottom has torque values on it... you can get them at most stores for $100 or less.. ive seen them as low as 15 from harbor freight, and from what i hear they work just as well or better than craftsman ones.. which are known to break easily