Doughty Clamp - Half Coupler (Lightweight) It is a lightweight half coupler clamp with a weight of 0.34kg, only a half of the standard one's. This clamp is the Basis of the range of Lightweight Doughty Clamps, being TÜV tested and certified to a WLL of 500kg. This Clamp has a slotted base to captivate an M12 Nut or Bolt enabling users to create fixings suited to their own individual requirements. For any inquiries, please contact us via chat. Spec Sheet - Doughty Clamp User Manual - Cert Specifications: TÜV Certified SWL: 500 Kg Tube Diameters: 48mm to 51mm Width: 50mm Fixings: M12 Hole Weight: 0.34 Kg Material: Aluminium Finish: Available in Black or Polished Aluminium Hook Clamp • Quick Trigger Clamp • Half Coupler Clamps Manufacturer Information: Doughty Engineering has begun to manufacture products for the entertainment industry since 1985. Now, it is one of the world’s leading manufacturers of rigging, suspension and lifting equipment for film/TV, theatre and concert halls. As a member of the Professional Light and Sound Association (PLASA), Doughty adheres strictly to the standards of trading expected.