Originally Posted by PeterM1
All torque wrenches allow you to set the desired ft/lb typically by rotating the handle and matching it to a specific numeric value. The range is engraved on the wrench. You use the torque wrench to tighten the bolts until you hear a clear audible "clicking" sound which means you're at that value.
exactly what he said is how they work. Idk something about impact wrenches scar eme when it comes to a specific torque value. I like them for some things but not for torquing bolts. something about manual torque wrenches like mentioned above ^ just seems so fail safe.