The ADJ Products Pro-Clamp is designed to fit 2 Inch 50mm truss and secures hanging fixtures with a mas load of 1100 lbs. 360 Degree wrap around clamp with tightening lock provides a safe and secure hold you can trust. Professionally constructed of heavy duty aluminum, these clamps ensure a secure hold for the heaviest of loads. Put safety first in your lighting design with professional fixture hangers.