Doughty T57224 TV-Clamp Black "NEW". The Doughty TV Quick Clamp is supplied fitted with a 29mm Receiver. Supplied with lynch pin for secondary locking. This Clamp is designed predominantly for use in the TV/Film industry. Manufactured from high tensile Aluminium Extrusion. SWL: 250 Kg, Tube Diameters: 48 to 51mm, Width: 50mm, Fixings: 29mm Receiver, Weight: 0.93 Kg,