Abstract: A wrench is disclosed which provides a hydraulically powered ratchet wrench within a compact footprint. One hydraulically powered piston operates to tighten a fastener, while a second hydraulic piston is operable to reset the first piston in preparation for a subsequent tightening operation. An intermediary torque multiplying device may be placed between the driven pistons and the object being acted upon by the pistons. Fluid supply hoses may be coupled to the wrench assembly using a two-axis swivel to facilitate insertion of the wrench assembly into areas that are difficult to access.