Convi Clamp, Heavy Duty Alloy Grip Clamp with 5/8" Hexagonal Receiver, Spring Lock Safety, and High Load Capacity for Mounting Lights, Cameras, and Accessories - Silver (KG701212)

I am using this with a length of Forney 49529 16 Gauge Square Tubing (1 1/4). The parts fit well together.

Maybe they should rethink how they describe the item because I had to purchase separately. Don’t buy thinking you can use right away except in the 90deg configuration. This is misleading. 2 stars for the cheap tricks.

Nice, addition to your kit.Heavy duty, well made equipment. Will complement any professional or amateurs toolset.

I have the clamps with the large handles, too. I like these. They fit in a smaller space in my bag. Not much smaller, but I'm carrying a bunch of these things and every little bit helps.

The clamp does not rotate. It is two clamps back to back with no flexibility

Great

I haven't really found a use for this one yet but it does work good