Abstract: A tool for severing or crimping a workpiece includes a rigid mainframe having an elongate grooved channel running through most of its length. A wedge-shaped upright rigid head forms the front portion of the mainframe. The rear portion of the mainframe has an integral shaft guideway and a mount for mounting a hydraulic cylinder and components. The head and hydraulic mount form a U-shaped jaws area. The upright head has an elongate vertical slot. A cutting or crimping blade can reciprocate along the grooved channel of the mainframe and enter the head so that the blade can fully sever a workpiece placed in the gap between the blade and head. The blade can be a pointed V-shaped cutting blade or a flat crimping blade having a blunt leading edge. The base of the blade has a flange for cooperating with the grooved channel for guiding the blade. The blade is manipulated by a hydraulic piston which is positioned in a hydraulic cylinder mounted at the rear portion of the mainframe.