Some torque drivers will be damaged if used for unfastening bolts. Is this tool ok for that??

You should never use a torque drive to unfasten, regardless of what is on the box. Torque drivers and wrenches have to be calibrated (and should be regularly recalibrated). Using them to unfasten causes them to become inaccurate faster, if not damaging the tool permanently.

Does anyone know the accuracy of this? It's odd that Park doesn't listed it on its website...makes me think it's up near +/- 6% or something.

I just (December 2019) purchased two of these, and tested both of them using a park tool tw-5.2 AND a Quinn digital torque adapter. Both Park ATD-1.2 torque drivers delivered higher torque than the indicated value. 4NM indicated on the ATD-1.2 was actually just over 4.6NM tested. The errors got smaller as the torque values went up...at 6NM indicated, the actual torque delivered was about 6.7 NM. In other words, at the low end the ATD-1.2 delivers about 15% more torque than indicated, and at the high end, it delivers about 12% more torque than indicated. This was consistent...both of my ATD-1.2 drivers gave me the same results, and the results were the same regardless of which device I used to measure them!

What is the difference between the atd 1 and the atd 1.2?

The ATD-1 is the old version the ATD-1.2 is the new version. The new one is a little easier to adjust the torque setting, but works basically the same.

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ATD-1.2 - Adjustable Torque Driver Tool,Blue

Product ID: 267398451

Details

Brand
Park Tool
Colour
Blue
Item length
0.18 Meters
Item weight
0.3 Kilograms
Material
Metal

🔧All-metal internal durability

🧲Magnetic bit retention

⚙️Torque adjustable 4-6 Nm

€ 193.53

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Master your torque, protect your ride — precision meets power in every turn!

BUILT TO LAST - All-metal internal construction ensures long-lasting, reliable performance on every job.
VERSATILE BIT STORAGE - Includes 3mm, 4mm, 5mm, and T25 bits conveniently stored in the handle for quick access.
ERGONOMIC COMFORT GRIP - Composite molded handle designed for fatigue-free use during extended projects.
PRECISION TORQUE CONTROL - Adjust from 4 to 6 Nm to prevent overtightening and protect your components.
FACTORY CALIBRATED EXCELLENCE - Assembled and calibrated at Park Tool’s Minnesota facility for trusted accuracy.

The ATD-1.2 Adjustable Torque Driver by Park Tool offers professional-grade torque control from 4 to 6 Nm, preventing damage from overtightening. Featuring all-metal internal parts for durability, an ergonomic composite grip, and magnetic bit retention with multiple included bits, this tool is factory-calibrated for precision and built to last. Ideal for cycling enthusiasts and pros who demand accuracy and reliability.

Specifications

ASIN	B076CX3WDT
ASIN	B076CX3WDT
Best Sellers Rank	#4,629 in Sporting Goods ( See Top 100 in Sporting Goods ) #6 in Bike Shop Tools
Brand Name	Park Tool
Color	Blue
Country of Publication	China
Country of origin	China
Customer Reviews	4.7 4.7 out of 5 stars (1,583)
Customer reviews	4.7 4.7 out of 5 stars (1,583)
Date First Available	17 October 2017
Department	Unisex
End Style	Torx End
Finish Types	Polished
Global Trade Identification Number	00763477000057, 07634770000576
Head Style	Adjustable
Included Components	ATD-1.2 - Adjustable Torque Driver
Is Discontinued By Manufacturer	No
Is Non Sparking	No
Item Highlight	bike-hand-tools
Item Length	0.18 Meters
Item Torque	6 Newton Meters
Item Type Name	Cycling Tools
Item Weight	0.3 Kilograms
Item model number	QKATD12
Manufacturer	Park Tool
Manufacturer	Park Tool
Manufacturer Part Number	QKATD12
Manufacturer Warranty Description	2 year manufacturer.
Material Type	Metal
Measurement Standard	Metric
Model Number	QKATD12
Number of Items	1
Number of Packs	1
Operation Mode	Mechanical
Package Quantity	1
Product Dimensions	17.78 x 12.7 x 5.08 cm; 302 g
Set Name	Single Tool
UPC	763477000057
Wrench Length Style	T-Handle

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