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

Product ID: 726983404

Details

Color
multicolor /
Brand
ACDelco Tools
Material
Alloy Steel
Item Length
66.7
Item Weight
0.01 Kilograms

📊±1.5% precision calibration

🔔Buzzer & LED flash alerts

⚙️1/2" heavy-duty ratchet head

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฿37206

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Tighten with confidence, torque like a pro!

SMART ALERTS - Audible buzzer and LED flash keep you in control and on target.
CERTIFIED QUALITY - ISO 6789 standard with calibration certificate ensures top-tier reliability.
VERSATILE TORQUE RANGE - Handles 12.5 to 200 ft-lbs, perfect for delicate to heavy-duty tasks.
PRECISION YOU CAN TRUST - Calibrated to ±1.5% accuracy for flawless torque every time.
PROFESSIONAL GRADE DESIGN - Industrial anti-skid grip and reversible 72-tooth ratchet for smooth operation.

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 calibration, and smart buzzer plus LED flash notifications. Built with a durable alloy steel body and an anti-skid grip, it meets ISO 6789 standards and comes with a certificate of calibration, making it the go-to tool for precise, reliable tightening in any professional or serious DIY setting.

Specifications

ASIN	B01GOUNZ10
Amazon Bestseller	#743,663 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #1,451 in Torque Wrenches
Brand	ACDelco Tools
Brand Name	ACDelco Tools
Color	multicolor (black / red)
Customer Reviews	4.2 out of 5 stars 243 Your Review
Finish Types	Polished
Global Trade Identification Number	04716872175420
Head Style	Fixed Ratchet
Included Components	Calibration Certification, Digital Torque Wrench, Metal case, User Manual
Item Length	66.7 Centimeters
Item Package Quantity	1
Item Torque	250 Foot Pounds
Item Type Name	ACDelco ARM303-4A 1/2" Angle Electronic Digital Torque Wrench 1.5 to 200 Feet Pound Buzzer Vibration & Flashing Notification
Item Weight	0.01 Kilograms
Manufacturer	Durofix, Inc.
Material	Alloy Steel
Material Type	Alloy Steel
Model Number	ARM303-4A-340
Operation Mode	Battery
Package Quantity	1
Unit Count	1.0 Count
Voltage	1.5 Volts

Reviews

N**C

Buy it.

10.05.2017

D**N

Precise

15.06.2025

T**H

Error message 1 week after use. “Err110” message. Shuts down

21.09.2024

M**R

Great torque wrench and easy to use.

28.04.2019

A**D

Fantastic for TTY fasteners

3.12.2022

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