Adaptive Technologies BC3-7J - Scissor Style Speaker Rigging Beam Clamp (3-8")Creating suitable overhead structural suspension points for rigging systems can be difficult so using the building's own structure can provide more options for the installer. Standard, pre engineered beam clamps attach to the building's beam structure and offer an easy, safe and predictable method of suspension. This unique beam clamp actually gets stronger as more weight is applied. Features: Scissor clamps stronger as the applied load is increased.