I've had 2 of these cheap ones now and the thread that attaches the bottom bit to the hot shoe adapter tends to strip - both mine have been like the one below:

11" Magic Arm with Hot Shoe Mount & Camera Mount for: Amazon.co.uk: Electronics (http://www.amazon.co.uk/Magic-Shoe-Mount-Camera-DSLR/dp/B007OWCBL8/ref=sr_1_5?ie=UTF8&qid=1385043362&sr=8-5&keywords=magic+arm)

I'm sure the Manfrotto one is good but I don't like the long handle - can someone recommend a quality one?

Pete

Manfrotto makes one with a knob. They are far superior to any others I've used.

Manfrotto 244N Variable Friction Magic Arm 244N B&H Photo Video


Bob

How does it lock Bob - I don't really need variable friction - I wonder if the locking action is not as secure as the one with the centre lever?

It'll be supporting a 5" field monitor - I want it to lock and stay that way until the end of the shoot!

What are the end connectors - 3/8"?

Pete

They are standard 5/8" baby grip studs that are tapped 1/4"-20. These arms are far more secure than the cheap arm you linked in your earlier post. These are made to do professional work every day. Sure they cost significantly more. Quality grip is expensive but, the first time you use it, you'll know why. Your monitor won't shake around precariously like it did with the other arms.

You will likely have to rework your mounting setup to use one of these arms. I usually attach them to a Manfrotto 035 super clamp on one end and then use whatever adapter I might need on the other end. The nice thing about the baby studs is that they have a flat on them so they won't twist when mounted.

Bob

Cheers Bob - ordering one right now!

I use those to mount cameras and gear on vehicles.

I can confirm that once they are locked down they don't slip.