... 3.weight:1020g 4.thickness:5mm BS1139 Swivel Clamp/BS1139 Pressed Swivel Coupler/BS1139 Pressed Rotation Coupler Size48.3 ... scaffolding couplers/clamps, such as double/fixed coupler, swivel coupler, fixed/swivel beam/grider coupler, putlog coupler, plank coupler, sleeve ... , ledger, transom, scaffolding ladder, adjustable u-head, universaljack, base plate, and accessories such as T bolt, eye bolt, hex ...