Efficiency’s hydraulic Alum-A-Shield combines the protection of a trench shield with the support of hydraulic cylinders.  Alum-A-Shield is activated much like the hydraulic shore, with the pump can connecting to a manifold that pressurizes the shield’s four cylinders evenly, forcing the sidewalls against the trench providing a safe, work environment.  The lightweight design allows installation and removal with a rubber-tired backhoe.