Search amazon for the CDI brand. They are Snap On's commercial brand. They are reasonably priced, and work well. If you are doing AN3 hardware, make sure you get the right torque wrench. The recommended torque is 20-25 in/lb. You should get a wrench that the required value falls in the middle of it's range, ie you don't want to use a 250 in/lb wrench to torque a bolt to 25 in/lb.
Yes, you will need more than one wrench...