ACDelco ARM303-4A-340 1/2” (12.5 to 250.7 ft-lbs.) Heavy Duty Digital Torque Wrench with Buzzer and LED Flash Notification – ISO 6789 Standards with Certificate of Calibration

Shuts buy itself while torquing which alters calibration and torque values. Have to restart torquing over and over. Error message. Angle torque way off. I bought it august 2023 and have been trying to find their fixing agency or whatever they call it for more than a year. Been emailing here and there just to know wheres acdelco repair but no replies. It is very expensive for something that has no tech support. I feel robbed. Dont buy

Best bang for buck when it comes to Torque Angle Wrenches. Lights, vibration, and beep feedback. Great value for what you get.

The ACDelco 1/2-inch Digital Angle Torque Wrench has become one of my go-to tools in the shop, especially for engine and drivetrain work that calls for torque + angle procedures. It’s accurate, easy to use, and built like a tank. The digital display is clear and easy to read, and the beep + vibration feedback makes it almost impossible to overshoot a spec. Whether I’m torquing cylinder heads, flywheels, or axle nuts, I trust this wrench to get it right every time. The angle function is a game changer — no need for an angle gauge or guessing. Just set the torque and angle, and it walks you through both steps. Great for newer vehicles that list torque-to-yield specs in degrees. Battery life is solid, calibration feels tight, and the tool itself has a nice heft without being bulky. It’s also great that it stores torque history and works in ft-lb, in-lb, and Nm for versatility. If you’re serious about precision and work on modern engines or suspension systems regularly, this wrench is worth every penny. It’s not just a torque wrench — it’s a diagnostic tool for fastener integrity.

Purchased mainly for the degree feature on this torque wrench as the wrench isn't really used for much else in my own opinion because just due to the precision of this torque wrench i wouldn't advise using it on torquing wheels. This torque wrench is mainly for torquing cylinder heads or crankshaft bearings or other torque applications that involve critical torque. Many i work with say "why not buy a Snap-on Tech Angle". The reason is because they are just too expensive so this is the next best option. I already own the 3/8 Digital Torque Wrench from ACdelco and have had nothing but success with it as i personally love it but trying to torque cylinder head bolts with a 3/8'' torque wrench is difficult so i had to purchase a 1/2'' version. Couple features about the torque wrench as it does N-m, Kg-cm, In-lb., Ft-lb, Angle Degree. The buttons are very easily to switch between different modes and the most feature used is the angle mode as it is EXTREMELY HELPFUL. It's just so simple as you press A-F-K button until it shows the degree in the corner then you toggle up or down to set the degrees. Now i seen many reviews that when you reach a degree it doesn't stop and reset, you have 0 it and restart and yes that is correct as it isn't like the Snap on that resets to 0 when you reach a preset degree. You will have to 0 it and then move on to the next bolt but if you try to turn it on the next bolt the buzzer with sound telling you that you have reached the degree. It's almost dummy proof in my opinion. The torque wrench is a good quality torque wrench as i have used it several times on cylinder heads. I think the only issue i see is when you are using degree tracking, the tracking works surprisingly well as it when you need to ratchet it back to swing the degree keeps set at what you stopped at but it does take a second for it to compensate as when you swing then sweep more degrees it will almost like not measure the degree. Also the ratchet is not a fine tooth ratchet so when you are sweeping it may not register a degree because it hast''t engaged on the next paw in the ratchet gear. It's not a horrible digital torque wrench, the accuracy i spot on as i have used on digital torque wrenches such as the Snap-on's and all seem to be inline with the correct torque. However the degree tracking it a little troublesome to get used to, it does work and i haven't had any issues yet and all seems to be going okay. Overall, i would say i would recommend this torque wrench as a substitute because it's a good decent quality torque wrench just half the cost of others.

Easy to use, easy to set, easy to hear. Overall it is great. If I had one complaint, it is that the auto-shutoff is a bit aggressive. A couple times I set it, hand tightened a bolt, and it shut off before it registeres that I was using it.

Works ok. Finicky. If you touch the battery cap end by the handle it will go off.