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SmallRig Universal Magic Arm with Dual Ball Heads (3", 1/4"-20)

BH #SM2157 • MFR #2157
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SmallRig Universal Magic Arm with Dual Ball Heads (3", 1/4"-20)
Key Features
  • 180° Mini Ball Heads on Both Ends
  • Length: 3"
  • 1 x Thumbwheel 1/4"-20 for Easy Mounting
  • 1 x 1/4"-20 Mounting Stud
Sporting a 1/4"-20 screw at each end, the 3" Universal Magic Arm with Dual Ball Heads from SmallRig can be used to mount an accessory on your camera rig at almost any angle. Compatible with a wide range of camera components, small lights, or sound gear, the arm has a payload capacity of up to 2.2 lb.
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SmallRig 2157 Overview

Sporting a 1/4"-20 screw at each end, the 3" Universal Magic Arm with Dual Ball Heads from SmallRig can be used to mount an accessory on your camera rig at almost any angle. Compatible with a wide range of camera components, small lights, or sound gear, the arm has a payload capacity of up to 2.2 lb.

Both 180° ball heads are fastened using the single, large thumb lever. One end of this arm is a simple 1/4"-20 screw while the other features a thumbwheel for easier mounting to your accessory.

SmallRig 2157 Specs

Mounting Threads
Thumbwheel: 1 x 1/4"-20
Stud: 1 x 1/4"-20
Payload Capacity
<2.2 lb / 1 kg
Dimensions
3 x 1.2 x 0.7" / 72.5 x 30 x 18 mm
Weight
1.1 oz / 32 g
Packaging Info
Package Weight
0.085 lb
Box Dimensions (LxWxH)
5.25 x 4.3 x 0.85"

SmallRig 2157 Reviews

Small but terrible!

By Edgar
Rated 5 out of 5
Date: 2025-09-24

Pretty handy for attaching accessories for your phone, camera or anything that requires flexible attachment. I use this for my GoPro camera and digital camera. Highly recommended.

Small but secure

By Ezra
Rated 5 out of 5
Date: 2024-08-28

I purchased a few of these to make a custom mount for my car to hold the iPhone I use for navigation away from the dashboard to keep my phone from overheating in the summer. Works perfectly. Stays tight and exactly where I want it. They also seem to be made well.

See any errors on this page?

What are the materials?

What are the materials?
Asked by: John
This is all metal, except for the collar on the 1/4" stud, which is made of plastic.
Answered by: Zachary
Date published: 2021-02-01
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