The pro-grade Trigger Clamp is ideal for use with a truss or pipe with an outer diameter of 2 inches (50mm) to 2.4 inches (60mm). Installation of lighting fixtures or key effects is a breeze, simply connect your light fixture or effect to the clamp then place the clamp in the desired location on trussing or pipe and securely tighten down via a large wing-type grip handle. The clamp also has an M10 wing-nut accessory bolt for an even more secure installation. Ideal for mobile DJs, light riggers, or theater stagehands.