Sometime, during the rescue operation, rescuers will have the problem that hydraulic oil is not enough, especially the hydraulic ram, hydraulic ram is used for lifting and supporting, it has the feature of higher lifting height, so it needs more hydraulic oil. If the hydraulic ram is under working, maybe other kinds of rescue tools won’t work. To solve the problem, mechanical ram provide the best choice. Mechanical ram doesn’t need hydraulic oil, but need a hydraulic rescue spreader or hydraulic combi tool to work together. The spreading function of spreader or combi tool will drive the mechanical ram extended to the right position, automatic lock will keep it stay at the position, so rescuers can use the spreader or combi tool do some other work, no hydraulic oil is lost, and the function of hydraulic ram is achieved.