AR20-1031 | DuraLock™ 20 Series 2" Long Single Anti-Theft Knob Arm | Black

6 reviews

  • Overall Arm Length Measurement - 2" 
  • Ball Center to Ball Center Measurement - 1.3"
  • Optional Anti-Theft Knob: (PATENT PENDING) This arm, although not always necessary, has optional anti-theft features. This can (A) help prevent snatch and grab situations on your motorcycle, SXS, or other similar environments. (B) The ball cannot slip from the socket if not properly tightened.
  • Ultra Short Reach:  This is Tackform's shortest double socket arm. The single knob design allows you to reposition your device quickly and easily, completely locking up movement for zero chance of slippage under its intended use.
  • Color Swap Compatible: Tackform offers a wide range of anodized billet aluminum knobs. This DuraLock arm is compatible with Tackform's DuraLock knobs, allowing you to customize your setup to match your vehicle. Black knob included.
  • Tackform 20 Series: Specifically designed for compatibility with Tackform’s 20 Series Platform, revolving around the 20mm ball and socket system. While compatible with other 20mm products, our parts stand out for their tested durability and engineered load capacities, featuring a safety factor not guaranteed by other manufacturers. Please Note: Not suitable for 25.4mm / 1” / B-Sized balls.



At Tackform, we are committed to providing you with top notch support.
If you have any questions or concerns about your order, please don't hesitate to reach out to our knowledgeable support technicians.

Our customer support team is available Monday through Friday 9:00 AM - 5:00 PM.


How long will it take to get my order?

  • USPS and Ground orders ship the same or next business day.
  • FedEx Express orders placed before 2 PM CST will ship same business day.
  • International orders, wholesale, and large bulk orders ay take an additional 1-2 business days for processing.

What shipping carriers do you use?

  • USPS
  • FedEx

Where do you ship from?

  • Tackform HQ (Addison Illinois 60101)

Can I return my product?

Of course, Tackform has a flexible 30 day return policy. You can find the full details by clicking here -> RETURNS


If we still haven't answered your questions, you can contact us below and we will get back to you as soon as possible.

"We're dedicated to providing you with the best possible shipping experience and we're here to help you in any way we can. Thank you for choosing Tackform. We look forward to serving you"

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Customer Reviews

Based on 6 reviews
Samuel L. (Budapest, HU)
The best arm for motorcycles

I was waiting a long time for this little arm to be back in stock. I used an older, longer arm on my Honda, but this little arm makes it so much tidier.
I really like how the components are compatible, I can just experiment and see what works best. Recommended!

Dennis M. (San Dimas, US)
Bronco mount adapted to Tacoma

I ordered the Bronco mount B20A-BF6 with the AR20-1031 2" arm and B20Q 20mm ball to mount my Zoleo satellite transponder to my grab handle, it works perfectly in my 2013 Toyota 2nd generation Tacoma. It places it up in the windshield out of the way and it can see the satellites.

Loren J. (Atlanta, US)
Nice phone mount

Perfect fit for my 2023 Bronco. Mount is very secure. Will be buying more attachments for this mount soon.

Michael M. (Newburgh, US)

AR20-1031 | DuraLock™ 20 Series 2" Long Single Anti-Theft Knob Arm | Black

Tj (Warwick, US)

AR20-1031 | DuraLock™ 20 Series 2" Long Single Anti-Theft Knob Arm | Black