The Axler 12" Dual Mega Ball Clamp Arm Mountfeatures four articulating joints with 1/4"-20 threaded studs and a 5" extension with threaded accessory mounting holes. The center lever on each clamp arm tightens or loosens that clamp. The threaded mounting ends feature a rubber-topped platform with a 1/4"-20 threaded stud. A thumbwheel rotates the studs, enabling you to tighten or loosen accessories.

Made from anodized aluminum, the mounting ends feature a ball joint system with an O-ring integrated into the ball. This allows you to tighten the clamp on the ball joints and lock it in place without having to overtighten the clamp. The ends can swing through more than 180° of arc and can be locked and held in place by merely tightening the center knuckle.

1/4"-20 Ends with Ball Joints    Center Lever Tightens Arms    5" Extension with Mounting Holes

This item is made by using two BCA-2 clamps and mounting a 5" extension bar (AS-5) between them. This creates a longer arm that also has four 1/4"-20 and four 3/8"-16 threaded mounting holes on the center bar for attaching accessories.

Made from anodized aluminum, this clamp is flexible and lightweight.

The integrated O-ring on the ball ends provides friction to hold the clamp in place, while allowing the ends to move when the clamp is loosened.

The O-rings also eliminate the need to overtighten the clamp, thus reducing stress on the clamp and extending the useful life of the clamp.

Related Questions and Answers

Q: 1. Does the ball lock in place on this? If so, which lever/screw locks the ball position?

A: The upper lever, under the monitor, is the ball lock.

Q: 2. I bought this piece already, considering getting another arm, will 2 arms sit next to each other without problems? Seem like they would

A: Otherwise, having two of these arms next to each other should be fine.

Q: 3. Has anyone ever tried this as a mic boom for long take live production?

A: Haven't tried it but it would work. You would probably need a grip head to hold the mike holder. The cranks for tilt and rotation would be useful. The crank to extend the arm is in an awkward place though.

Q: 4. What is the diameter of the ball on this head?

A: The diameter of the SmallRig 2164 Multifunctional Crab Clamp with 3.5" Ball Head Arm's ball section is 1.5".

Q: 5. What mating structures are on the end shown only in profile here (on the right side of the image: the larger diameter end)? A female 1/4-20? A female 3/8-16? Something completely different?

A: Both ends are 1/4 20 and there is a male to female converter that can be removed. The Converter has a 1/4 20 Female and a 3/8 female with a 1/4 20 reducer bushing.

Q: 6. Can I use a third party extension if I want it to longer on certain occasions?

A: We are not aware of any third party extensions that would work for this product. If you needed a longer reach, you would need to look in to using a longer arm. Acebil offers the Multiple Function Magic Arm / Two Joint which is 15 inches instead of 12. https://bhpho.to/2Jz1bUN

Q: 7. Will this work with a Sony A7iii and an Atomos Ninja V5?

A: yes, the articulating arm will support the payload of the display. But we always highly suggest a roll cage for extra stability.

Q: 8. What stand would be recommended to hold the 425B mega boom?

A: Avenger Low Base Roller Light Stand 36 11.8' BH #AVA5036CS

Q: 9. how long is the arm from one side-mount to the other side-mount? thanks.

A: The Godox Dual Mount Arm measures to 16 inches from 1/4"-20 to 1/4"-20 mounting points.

Q: 10. How much weight does it support?

A: The 12” Dual Mega Ball Clamp Arm with 1/4-20 Accessory Mounting, can support around 3-4 Lbs of equipment. However, the weight capacity varies depending on how the unit is positioned.