Fixed Clamp 1. BS1139 type pressed clamp 2. Size:48.3*48.3mm, ... 4. Zinc plate finished Fixed ClampBritish Type Double Clamp/Heavy Duty Pressed Fixed Coupler/BS1139 Pressed Right Angle CouplerSize48.3 mm ... and pressed scaffolding couplers/clamps, such as double/fixed coupler, swivel coupler, fixed/swivel beam/grider coupler, putlog coupler, plank coupler, sleeve coupler, joint pin, single coupler, etc ...