KUPO Slim Type Mighty 28mm (1-1/8") Spigot Coupler (KCP-864) is constructed from high tensile aluminum extrusion with a 28mm (1-1/8") TV spigot. Heavy duty and working load limit is up to 200kgs (440lbs). For dia. 51-60mm (2"~2.36") tube. A captive on top of thread bolt to avoid wing nut falling off the clamp. The pin can be mounted into a combo stand to span between two stand as a goal post rig.