... :990g 3.thickness:body3mm/base20mm Pressed Beam Clamp/Grider Coupler/Pressed Light Duty Beam CouplerSize48.6 mm or 1 1/ ... clamps, such as double/fixed coupler, swivel coupler, fixed/swivel beam/grider coupler, putlog coupler, plank coupler, sleeve coupler, joint ... , etc.+We also provide standard, ledger, transom, scaffolding ladder, adjustable u-head, universaljack, base plate, and accessories such as T ...