mountain ark 5 Pack 2 Inch Quick Release Heavy Duty 220 Lbs Aluminum Alloy Stage Lighting Clamp for Moving Head Light Par Light Spotlight Suitable for security stage lights, and other light with 9.6mm diameter install hole,fit truss F34 Heavy duty aluminum alloy material hook clamp for moving head light, par light, spotlight and so on.... Quick and easy to attach, remove or re-position of your light Completely wrap around truss for added security and stability Ideal using in stage, DJ, Bar, Pub, Event, Theatre, Disco