The Doughty Clamp Half Coupler is the Basis of the range of Doughty Clamps. This Clamp has a slotted base to captivate an M12 Nut or Bolt enabling users to create fixings suited to their own individual requirements. Manufactured from high tensile Aluminium Extrusion. SWL:750 Kg Tube Diameters: 48 to 51mm Width: 50mm Fixings: M12 Hole Weight: 0.63 Kg Boxed Quantity: 12