a torque wrench isn't something to cheap out on son!!! Get a decent one...harbor freight doesn't sell a decent tool! Go to sears and spend $100 on a nice wrench! Craftsmen isn't the best but they are good tools for what you pay for...plus if you break a tool you can exchange it at any sears for free for life!
You get what you pay for and torque wrenches are not to be treated like a normal wrench! Keep it in it's box, keep it out of the bad weather, don't drop it or use it as a hammer, don't break bolts loose with it, if it's a click type then only click ONCE..I see people who let it click and they release pressure and make it click again DONT DO THAT!, never ever put it away with it set on a pound #..always turn it back to zero to release spring tension! They are to be considered "precision measuring tools" and not typical wrenches!