Hook Clamp 20mm - Doughty Engineering Manufactured from high-quality steel, this hook clamp is simple to use and extremely strong for hanging fixtures. This Doughty hook clamp is the smallest one of the hook clamp collection, fitting 20mm (¾") diameter bars/tubes We also supply larger sizes to fit 30mm, 50mm and 75mm diameter bars. Check out the full range of Doughty Hook Clamps which suit a wide range of functions. For any inquiries, please contact us via chat. Specifications: SWL: 15 Kg Tube Diameter: 20mm Overall Height: 65mm Width: 20mm Fixing Hole: 8mm Weight: 0.27kg Material: Steel All Hook Clamps are Stamped with SWL Other Sizes of Doughty Hook Clamp: 30mm Hook Clamp 50mm Hook Clamp (Standard, Light Duty, Medium Duty, Heavy Duty) 60-75mm Hook Clamp 25-51mm Hook Clamp 38-51mm Hook Clamp Speciality Hook Clamps (50mm): Straight Ended (SWL: 40 Kg) Extra Long (SWL: 40 Kg) With 29mm Spigot (SWL: 150 Kg) Double Ended & 180 degree Twist (SWL: 40 Kg) Double Ended & 90 degree Twist (SWL: 40 Kg) Double Ended & Parallel (SWL: 40 Kg) Double Ended for 63-75mm & 48-50mm Tubes (SWL: 150 Kg) Hook Clamp • Quick Trigger Clamp • Half Coupler Clamps