ADJ Trigger Clamp Heavy Duty ClampAmerican DJ Trigger Clamp Heavy Duty Clamp The American DJ Trigger Clamp is a 360 wrap around tube truss clamp intended to secure heavy fixtures to 1. 5 2. 0" truss pipe. The large "wing nut" type handle facilitates rapid mounting. Key Features Tub Truss Clamp Fits 1. 5 2. 0" Pipe Secure Fixture Support Technical Specs Compatibility 1. 5 2. 0" (38. 1 50. 8 mm) pipe