Believe it or not, Harbor Freight has started to offer higher quality tools lately... including torque wrenches. Here are some tests of them against big names... as well as checking against calibration machines.
Harbor Freight Icon ($109) vs. Snap-On ($400)
Here is a spoiler, when it comes to accuracy, the Icon actually won.
https://www.youtube.com/watch?v=ck_O5U1Tyz8
Harbor Freight Quinn electronic. $169 and really nice if you like torque wrenches with batteries. Uses two AA batteries that can be removed for storage... which is recommended. Also does torque angle. Super accurate... and many like it better than the Snap On.
https://www.youtube.com/watch?v=ck_O5U1Tyz8
https://www.youtube.com/watch?v=ck_O5U1Tyz8
Some may not know about 'Torque Angle'. This is where the tightening specific tells you to torque to a lower number such as 40 ft-lb... then to turn it a number of degrees past that. An example would be 40 ft-lb plus 90 degrees... or 70 ft-lb plus 45 degrees. You can set the electronic wrenches for the spec, and they will tell you when you have rotated the fastener that exact amount. YES. They even measure degrees.
For the style wrenches seen in the Icon vs. Snap-On video, do not store the wrenches with the torque cranked up. Always dial them back to zero for storage to best maintain calibration.