If it is shown that the torque readings are not correct, can the torque calibration be adjusted by the owner of the wrench? Or is it non-adjustable?

I don’t think or I don’t know of a feature to calibrate the wrench. On a normal car it is 100lbs. And, it varies depending on make and vehicle. You will have to google it. But, 100lbs it is tight.

Does this does angle measurement for engine head bolts ??

When you power it on, you need to leave it on a flat surface when you see 00000. It is calibrating the Angle accelerometer. If you keep moving it around, it will take forever to boot.

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🔧 Tighten with confidence, never miss a beat!

SMART ALERTS - Audible buzzer & LED flash keep you in control
ERGONOMIC DURABLE - Industrial anti-skid grip with rugged alloy steel build
PRECISION PERFECTED - ±1.5% accuracy for flawless torque every time
VERSATILE POWERHOUSE - Wide 12.5-200 ft-lb range covers light to heavy-duty tasks
PRO GRADE CALIBRATION - ISO 6789 certified with calibration certificate included

The ACDelco ARM303-4A-340 is a professional-grade 1/2" digital torque wrench featuring a wide torque range of 12.5 to 200 ft-lbs, ±1.5% precision accuracy, and an intuitive buzzer plus LED flash notification system. Certified to ISO 6789 standards with a calibration certificate, it’s built with durable alloy steel and an ergonomic anti-skid grip, making it the ultimate tool for precise, reliable tightening across diverse applications.

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Brand	ACDelco Tools
Model Number	ARM303-4A-340
Product Dimensions	5.08 x 5.08 x 66.68 cm; 10 g
Color	multicolor (black / red)
Name List for Name Plates	Wrench
Material	Alloy Steel
Power Source	Battery Powered
Voltage	1.5 Volts
Torque	2.5E+2 Foot Pounds
Included Components	Calibration Certification, Digital Torque Wrench, Metal case, User Manual
Are Batteries Included	No
Battery Type	Lithium Manganese Dioxide
Item Weight	10 g

ACDelco ARM303-4A-340 1/2" Heavy Duty Digital Torque Wrench with Buzzer and LED Flash Notification - ISO 6789 Standard with Certificate of Calibration

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