FD/HD Bold on Twist Joint is a prefabricated connector designed for creating T-connections in aluminum truss systems. The 210 mm version (CS1-DC21) specifically interfaces with FD/HD34 Corners. These twist joints match standard T-joint dimensions used in both standard rigs and ground supported structures. The design allows for secure mechanical connections with minimal mounting space requirements. The standard version is available, while a slim line variant can be specified (by adding 'S' to the product code) which requires less mounting space when truss braces might otherwise interfere. These components are precision-engineered for professional event rigging applications where reliable connections are critical.