Doughty Quick Trigger Hook Clamp The Quick Trigger Hook Clamp is supplied with a Wing Nut and M12 Bolt Fixing. A large Easy-grip handle is fitted for ease of use. An extremely useful clamp for hanging valuable luminaries safely and easily on any points of the truss without obstruction. Quick Trigger Clamp Demonstration - A Light Hung Next to Cross Beams Without Obstruction The spring-loaded jaws stay open and automatically close with the weight of the object being hung, leaving both hands free to lift and position the load. Broadly applicable in the theatre, film, TV and photographic industries. For any inquiries, please contact us via chat. Spec Sheet - User Manual - Cert Specifications: SWL: 250 Kg Tube Diameters: 38 to 51mm Width: 50mm Fixings: M12 x 45 bolt & wing nut Weight: 0.84 Kg Material: High tensile aluminium Finish: Polished Aluminum / Black Powder Coated Other Quick Trigger Clamps: Without Fixings: 25-38mm, 38-51mm (Standard/ Slimline), 48-80mm With Fixings (bolt & wing nut): 38-51mm (Standard / Slimline), 48-80mm With an Eye: 38-51mm (Standard/ Slimline), 48-80mm With a Half Connector: 38-51mm With a 29mm Receiver: 38-51mm (Standard/ Slimline), 48-80mm