Abstract: A dual-purpose adjustable wrench is comprised of a wrench body, a movable jaw unit and a worm gear rack mechanism for providing a rapid adjustment of the wrench. The wrench is further comprised of a clutch unit to enable the jaw opening to be quickly adjusted. The movable unit comprises a toothed element hinged at one of lateral sides of the movable jaw. The wrench can be alternated to function as a pipe wrench by removing the movable jaw unit, reversing and inserting it back into the wrench body.