[5/8" Stud] I bought this to do some product photography and also to do some different lighting setups. It works great. I attached one of my speed lites 600ex-rt and it was excellent. I can move it around and point the light even straight down at the floor to get some different shots. The clamp locks right into the ridges and holds position well.
I hope this helps with your decision.

[49 x 6.5 x 5.5"] Great boom. Sturdy. It's heavy, but that's ok because it's not going to break easy. I use these on my 18 full moon lights.

[5/8" Stud] Crucial piece of hardware for lighting a studio. This one is stout and will not let you down.

[49 x 6.5 x 5.5"] Have been using this arm with a Falconeyes flexible Softbox and it works great. Allows for a more downward angle than the stock attachment on the softbox. Build quality is impressive and heavy. You will definitely need a fairly robust light stand. I use the power brick/control box of the Falconeyes as the counterweight on the stand and it works well. Highly recommend.

[49 x 6.5 x 5.5"] Excellent product. Very well made and easy to use. Actually using this with a DSLR camera on a reasonably heavy stand, to photograph artwork from above. Have outfitted it with female stud to 1/4-20 tripod mount + tripod head.

When using with CFL bulbs in softboxes, we do need to wait a few seconds for things to settle down before remotely releasing the shutter, but that was expected going in. This was really intended as a light boom, but it's very good for our purposes.

We anticipate going to strobe lights before long, but either way, I like this boom. Great value.

[49 x 6.5 x 5.5"] Really good quality, heavy duty.

[Steel] Pretty invaluable for wider frames and tighter spaces. There are some things about the build that I suspect might prove less than reliable (days are numbered for that foam handle on the counterweight side), but otherwise, it's easily worth the money and built well to boot.

[2] Working as gaffer, I often need to boom out lights overhead to be able to get wide shots. I had a shoot where I needed to boom an Aputure 120dII with lantern attachment over a kitchen table and this thing worked great. I paired it with a Kupo Master Combo Stand and a number of sandbags and it got the job done. If needing to boom something really far away this won't cut it, you'll need to a Menace Arm, but for small to medium size spaces where you need wide shots and lights out of frame, definitely pick this up. All connections are sturdy too, well built steel, get it.

[49 x 6.5 x 5.5"] We've operated a long time without a boom arm, and while we've made it work, being able to boom a light across a table or over a packed set can really make life a lot easier. This arm seems perfectly well built and fully durable for owner/operator set work. I think if there's anything that probably won't last it will be the foam towards the counterweight side of the boom. but it will still be usable and is entirely acceptable given the entirely reasonable price.

[49 x 6.5 x 5.5"] This boom arm is well built and was vital for a product shoot. Happy with the build quality!