HG-1 Universal Bracket • Manufactured from extruded Aluminium. • Mounting holes from M8 to M10 screws. The HG-1 Universal rigging bracket is time-saving rigging solutions that provide a safe method of securing loads at ceiling or truss. Once anchored, they provide a simple and reliable method for aiming loudspeakers. HG-1 is secured to the ceiling or truss throug a threaded hole to attached it a clamp truss or ceiling embedded screws.