The patented, industry-standard ballast solution for truss grids, arches, and outrigger applications, featuring a steel-encased concrete core built to resist chipping and eliminate lost ballast weight. Bolt patterns on five sides accommodate 12×12″ and 20.5×20.5″ box truss, plus bolt truss in four horizontal directions, and forklift access on two sides makes placement fast and safe. Trusted by major touring and event productions as a safer, more adaptable alternative to bare concrete blocks.