MFL. Heavy Duty Truss Clamp, 660 lb Aluminum Alloy DJ Light Clamps, Fits 1.5-2.0 Inch Truss for Stage Lighting Projector Par Lights, TUV Certificated ID: 50393001, Silver, Pack of 4

Great quality

I use these to as mounts for a custom roof rack I made to attach to my 91 Jeep YJ’s roll bars. I take my kayaks and paddle boards on adventures with ease.

As expected, nice, high quality, solid clamps. Nothing's going to tear them off the truss!

This was good and worked well. Felt solid for sure. Would probably be just fine if I was using it on a permanent install. However, when I have to take it on and off a light regularly it's kind of a hassle due to the need to use an allen wrench and the nylon locking type nut to attach/remove the fixture. Much easier with a clamp that secures a bolt head inside the clamp and a wing nut or something. Not a deal breaker, but does add extra time on setups and load outs if they need to be removed to be in a case. In use though it works great!

I'm using these to attach a heavy duty volleyball net to 2" poles already at the gym. I threaded some M10 eyelets into the screws coming out of these clamps, and now I have a very robust and convenient attachment point for the nets. These clamps knock down quickly, and I love the added touch that the wingnut is captive by a dent made in the threads. I don't have to worry about losing hardware.