C-Clamp

I really like these clamps - they're really inexpensive, and allow you to move a fixture without any tools. From the Manufacturer: The C-Clamp is designed for light to medium duty hanging applications. Bring safety and stability to your performance with this clamp. It tightens down securely to ensure you get that locked in feel. A great performing clamp at a value price.   In the Box: (1) C-Clamp Video Review:  Features: Heavy duty clamp designed for most hanging applications Fits up to 2" truss or pipe Max Load: 110 lbs/50kgs