[demick]

I have all three (1/4", 3/8", and 1/2"), and for the price, cannot be beat. Like any other torque wrench of this style, you need to dial the torque back to zero each time you put it away. If you do that, it will stay accurate for a long time. Leaving the torque dialed up (spring compressed) will ruin the accuracy of any torque wrench - but perhaps much more quickly on a cheap torque wrench such as these.