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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🔧 Master your torque game with precision and style!

BUILT TO LAST - Robust all-metal internal construction ensures longevity and reliable performance on every job.
VERSATILE BIT STORAGE - Includes 3mm, 4mm, 5mm, and T25 bits neatly stored in the handle for quick access and seamless workflow.
ERGONOMIC COMFORT GRIP - Composite molded handle designed for extended use without hand fatigue—work smarter, not harder.
PRECISION TORQUE CONTROL - Set exact torque from 4 to 6 Nm to protect delicate components and avoid costly overtightening.
FACTORY CALIBRATED ACCURACY - Assembled and calibrated in Minnesota for trusted precision every time you tighten.

The Park Tool ATD-1.2 Adjustable Torque Driver is a professional-grade tool engineered to deliver precise torque settings between 4 and 6 Newton Meters. Featuring an all-metal internal build for durability, an ergonomic grip for comfort, and magnetic bit retention with multiple included bits, it prevents overtightening and protects lightweight components. Factory calibrated in the USA, it’s the essential torque driver for meticulous professionals who demand accuracy and reliability.

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Manufacturer	Park Tool
Part number	QKATD12
Item Weight	302 g
Product Dimensions	17.78 x 12.7 x 5.08 cm; 302 g
Item model number	QKATD12
Size	One Size
Color	Blue
Style	ATD-1.2 - Adjustable Torque Driver
Finish	Polished
Material	Aluminum
Pattern	Single
Power source type	ac
Torque	6 Newton Meters
Item Package Quantity	1
Head Style	Adjustable
Measurement System	metric
Included components	ATD-1.2 - Adjustable Torque Driver
Batteries Included?	No
Batteries Required?	No
Battery Cell Type	Lithium

Park Tool ATD-1.2 - Adjustable Torque Driver Tool,Blue

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