Just received an ex display sealey STW1011 torque wrench from ebay for a few jobs I'm doing on my car. Ive just had a look at it and it seems to be just working like a normal wrench. On the lowest torque setting (7nm) it just turns and makes no sound or anything and just keeps tightening up the nut.
Theres a hex bolt on the side of the wrench but I'm not sure what its for so haven't tried adjusting it. Ive received no instructions with it either as its ex display but it was like this when i opened it.
Any suggestions?
Theres a hex bolt on the side of the wrench but I'm not sure what its for so haven't tried adjusting it. Ive received no instructions with it either as its ex display but it was like this when i opened it.
Any suggestions?

. 

. Thing is though i only need to do a few jobs so its not worth splashing out on a decent one. £30 is my limit really, i thought i was lucky to find this Sealey one for that price but obviously not lol. 
. I'm going to send it back and buy one from a proper on line store, even if they mend it and send it back theres no guarantee that its calibrated properly.