Abstract: A ratchet-type wrench including a working head, a lever arm that can be angularly positioned, and a locking mechanism disposed between the lever arm and the working head for securing the working head in the angled position. An axially arranged spindle in the lever arm operates the locking mechanism, with a handle being adapted to rotate the spindle and also pivot the lever arm to enable the wrench and locking mechanism to be operated by one hand. The locking mechanism includes an axially non-rotatably displaceable catch member provided at the lever arm, with the catch member being adapted to be brought into shape mating engagement with the working head.